32 Weeks: To Due List

July 9, 2012

Like most women in their third trimester, I often wonder when I will go into labor. Hopefully not anytime soon! I have friends who went into labor at 36 weeks and women in my yoga class a week overdue on the eve of induction. And many of you have shared in the comments that you or a close friend delivered at 26… 30…32 weeks (thankfully to healthy babies.) I think we all know the “due date” is just a guess – based on a number of factors and definitely not a date to get too attached to.

I did a little research on due date background and found Naegele’s Rule of a 280 day gestation from the last normal period or 266 from ovulation. The numbers have held up in a few studies with 280 (281 for first time moms) days of gestation with a standard deviation of anywhere from 7-13 days. But his rule is also based on a 28 day cycle and ovulation on day 14, which I did not have!

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This article states that induction rates have doubled in the last decade but after delivery it’s determined that over 70% of these women aren’t even “overdue” at time of induction due to incorrect due date calculations! Ina May talks about this in her books as well. My doctor has said my practice induces at 41 weeks.

Thinking back to the cycle I conceived…I didn’t ovulate on day 14. It was actually day 24, or 10 days beyond average.

Ovulation

If you use my last period date alone, my due date is way off – and I might have been one of those induction cases! Luckily I was charting and using an ovulation predictor, so I’m fairly confident in the date of conception, give or take 24 hours. When I first got a positive test, I plugged in the ovulation date, not the last period start, into the calculators and got to August 31. My ultrasounds have matched gestational age nearly to the day, which further confirms my ovulation-based EDD. And luckily my doctor has put August 31 in my chart as the “official” EDD. He agrees with my assessment.

I doubt my mom’s labors really have that my genetic influence, but my sister and I were both early by a few days. Matt was right on time.

It would seem that whatever it is that determines when labor starts would start counting from conception. I believe that the baby’s gestational age and physical maturity trigger a hormonal release that it’s time to come out that starts the domino effect that puts a woman into labor.

But what if counting starts with egg age? What if since my egg was 10 days older than the typical cycle it thinks it’s ready sooner? And what if somehow that hormonal release is triggered by the date the egg decides it’s the primary one and not the conception date? [Gosh my brain hurts from trying to recall the female reproductive cycle details…] I don’t think the baby would release the hormones if he wasn’t ready to come out, but it would explain why there is such variation from baby to baby.

For all of these reasons, I’ve been having a gut feeling that I might go into labor early.

However, I think this could also easily be my anti-procrastining, type A self being worried that we’re not ready yet! Or residual worry from those 2 weeks when I was a little concerned about cervical incompetence (which was since found to be totally normal). I’m not putting too much confidence in the gut instinct.

Please note these are just some ponderings and not something I’m obsessing about….but as August 31 gets closer, or really just as August gets closer, I can’t help but wonder what my body will do! I HOPE I go to 40 weeks because that will be best for the babe! August 26 would make a lovely birthday. Karen’s birthday is September 1, so she’s rooting for a grandson as a birthday present. And finally having a baby on Labor Day would be pretty fun too : )

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{ 87 comments… read them below or add one }

1 Sana July 9, 2012 at 8:19 am

My sister was a labor day baby, it’s fun for sure :)!

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2 Reghan July 9, 2012 at 8:27 am

I’ve been starting to think about when I will go into labour lately too! Must be what happens when you get further along! The one good thing about doing IVF is that I know exactly when I ovulated and conceived! :) My due date is August 22nd and for some reason I think I will be late but my hospital induces at 41 weeks too so I know I will only be a week late at the most. My husband thinks he will arrive on his due date. I’d love to go early as long as it’s after 37 weeks!! I hate not knowing!!!! I’m too impatient. My birthday is August 7th but I don’t think I will go that early to share a birthday.

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3 Abby July 9, 2012 at 8:45 am

“But what if counting starts with egg age?” This paragraph really confused me…I’ve never read anything about a due date being based on anything other than when an egg was actually fertilized. Can you tell me where you heard about this? I’d love to read more about it. Just curious because I had a similarly irregular cycle and am due in August also!

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4 KERF July 9, 2012 at 8:53 am

I haven’t heard anything about it – in fact I doubt it’s correct. It’s just a variable in pregnancy that might explain why women deliver within that standard deviation of their EDDs

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5 Nicole of Raspberry Stethoscope July 9, 2012 at 9:05 am

But all of your eggs are the same age–your age!

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6 KERF July 9, 2012 at 9:26 am

I’m referring to when one of the follicles becomes the dominant egg!

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7 Chloe July 10, 2012 at 2:02 am

They are still the same age. Your egg becomes an embryo once the sperm fertilizes it and that is when gestation begins, it doesn’t matter when you ovulated.

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8 Kate L. July 9, 2012 at 8:52 am

The fact that we give women this exact date is silly. We should tell women late in the month, early or mid month. I’ve known too many women that hold to that date like it’s the magic number then freak out when they go one day over. Induction is medically necessary in some cases, but far too many women get induced because “they’re done” or “I’m uncomfortable” – I went about 12 days over (2 days shy of 42 weeks, which I did agree we would then induce) and knew I’d deliver a large baby, so I know how that feels. However, I wouldn’t let a doctor’s office automatically force me to induce at 41 weeks just because that’s what they want to do. With my child that I went over with, (the first one was a little “early” according to due date) I went in for almost daily stress tests and fluid level checks – that way we could assured that there was no problems but also give baby the chance to come when he was ready. He was on the bigger side (we knew that all along the pregnancy practically!) but otherwise delivery was perfectly normal and I’m glad that we didn’t induce and raise my chances for a c-section.

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9 Mom July 9, 2012 at 8:55 am

What about August 20, our 35th wedding anniversary? That’s just a little early…

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10 KERF July 9, 2012 at 9:28 am

That would be fun too!

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11 Jessica July 9, 2012 at 8:58 am

Wow, I’m really surprised your ob/gyn practice induces at 41 weeks! That’s really early – my doctor doesn’t even start talking about induction until you’re 42 weeks. I’ve read in a number of difference sources that the average first time mom (with no complications and not induced) delivers at 41 weeks + 1 day. I’m really lucky I had my doctor; I was almost a week overdue when I finally went into labor on my own, and he never once brought up induction. I specifically chose a doctor with the lowest c-section rate in my city, and I imagine it’s in part to the fact that he doesn’t push “early” (pre-42 weeks for healthy pregnancies) inductions.

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12 KERF July 9, 2012 at 9:27 am

41+1 doesn’t seem like an average to me – but definitely not uncommon at all.

I’d probably try evening primrose and castor oil before 41 weeks arrives

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13 Jessica July 9, 2012 at 9:48 am

Well, 41 weeks and 1 day is what we were taught in our Bradley class based on this study (http://www.ncbi.nlm.nih.gov/pubmed/2342739), and all of my pregnancy books said 38-42 weeks is considered full term. I wouldn’t start trying to force labor before 42 weeks- your body knows what it needs to do, naturally!
And I wouldn’t really recommend castor oil, my doctor said not to use it, because it induces extreme diarrhea and can easily cause dehydration (the last thing you want right before you have a baby), the scientific research that has been done on it shows that it doesn’t actually induce labor.

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14 KERF July 9, 2012 at 9:52 am

I’ve had several friends (and my doula’s experience) say it works very well – it’s not going to induce if the baby isn’t ready like if you tried it at 36 weeks but if labor is imminent, it can definitely help.

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15 Jessica July 9, 2012 at 9:55 am

I was basing my statement on this study: http://www.ncbi.nlm.nih.gov/pubmed/19780733
If your friends say it worked for them, good for them, but personally when I was 41 weeks pregnant I was feeling SO huge and gross and unwieldy, I can’t imagine purposefully inducing explosive diarrhea!

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16 Jessica July 9, 2012 at 10:13 am

If labor is imminent, you wont need castor oil, your body will go into labor on it’s own :)

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17 Elizabeth July 9, 2012 at 12:21 pm

Obviously you will check with your OB first, but I second the castor oil caution. My midwives do not recommend it for the reasons Jessica said. That said, they are homebirth midwives and we don’t really have a “deadline”- just have to do an ultrasound at 42 weeks to ensure there is proper fluid and assess the placenta.

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18 katie July 9, 2012 at 12:32 pm

I just don’t get how they know it helped- if labor was imminent, then how is it obvious that castor oil did help or if labor was just about to happen anyway? I’m 37 weeks today, so I’m curious (and have the same reaction to other tricks- not sure how to distinguish between what works and what someone did that didn’t affect the process that was happening anyway!).

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19 KERF July 9, 2012 at 1:45 pm

Check out Healthy Tipping Point’s post on primrose oil, accupuncture, etc. As far as I know, all the natural remedies will only help to speed a natural process but won’t induce

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20 Jessica July 9, 2012 at 2:02 pm

Here’s a cautionary tale (anecdotal, of course) about trying to force labor before your body’s ready: http://www.modgblog.com/2010/12/19/birth-story-the-final-installment-after-this-we-talk-about-wine-again-promise/
I read that story many times when I was a week overdue, and luckily I resisted the urge to try any of the “old wives’ tale”-types of induction techniques and just waited until my body started on it’s own. It’s a good practice in patience, waiting for an overdue baby, and a great lesson for parenthood!

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21 stephanie July 9, 2012 at 4:25 pm

I was “overdue” (ended up with my water breaking in the middle of the night 12 days past my daughter’s “due date”). My care provider was a naturopathic doctor/midwife. I tried everything under the sun to go into labor, including castor oil (against her recommendation NOT to do it). And oh my gosh. I strongly discourage anyone from doing that. It makes you so sick– it just induces massive diarrhea to the point where yes, you are dehydrated and yes, you are cramping so yes, it brings on contractions in that sense. But they are not real labor contractions (because it doesn’t make baby release that hormone). Ugh it was awful and I couldn’t do anything that day because I was tied to the bathroom.

I did acupuncture two days before my water broke as well as Chinese herbs. Hopefully you will not have to think about any of these things though and baby will come when he’s ready!

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22 Nicole July 9, 2012 at 12:43 pm

The other negative side effect of the mom taking castor oil is that it also gets to the baby and can cause the baby to have meconium in utero. If it causes diarrhea in the mom, it can also do the same to baby. Although meconium doesn’t usually cause major problems during birth (unless it looks like “pea soup”), it’s still a complication that I know I’d rather not deal with during birth.

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23 KERF July 9, 2012 at 1:44 pm

Hmmm…meconium is bad. Ina May Gaskin didn’t mention this risk and was pro-castor. Do you disagree with her?

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24 Nicole July 9, 2012 at 2:00 pm

I don’t know if I disagree with her but I have read about this possibility happening on several midwifery boards (and if you think about it, it just makes sense that it could cause it). I just always err on the side of caution when it comes to possibly introducing any complications with labor/birth–especially since I had a birth center and a home birth with my second and third sons and didn’t want anything to risk me out of them and cause me to have to go to the hospital.

And the bottom line is that I agree with what you said…if your baby and body aren’t on the verge of labor anyway, something like castor oil isn’t going to likely “make you” go into labor. My strong belief is that your body has grown this baby perfectly for the past 40 weeks…it’s not going to suddenly forget what it’s supposed to do in the last week or two ;)

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25 KERF July 9, 2012 at 2:21 pm

Thanks Nicole!

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26 Kate L. July 9, 2012 at 2:43 pm

I think this is an especially good point for women that want a drug-free labor. You definately don’t want to induce then (and couldn’t if you were delivering outside a hospital) and you don’t want to take something – even if it’s “natural” – that could possibly compromise your drug-free and/or home birth experience. I agree with you 100% about what you said below concerning inductions happening way to often these days. Should be a last resort for obvious problems – not a way for mom to be out of being uncomfortable. Besides, after giving birth, you don’t immediately go back to feeling stellar anyway! You go through a different kind of uncomfortable and this time with a new baby to care for. I’m all for interventions with the pain *after* labor has started naturally, but let your body and the baby lead the way on when he/she should be born.

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27 KERF July 9, 2012 at 2:49 pm

I didn’t think about the natural remedies as “interventions” but I guess they are in their own way! I’m just so terrified of a hospital induction I think if my choice was natural remedy or hospital cervadil/pitocin, I’d try the natural first. But I agree – best to let things be. I will have to bring up induction with my doctor, although I’m tempted not to bring it up unless it’s looking like a possibility.

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28 Nicole July 9, 2012 at 3:12 pm

The best way to handle a care provider who is mentioning induction is to simply ask them how the baby looks and how the mom looks. If the answer to both of those questions is good or fine, then they’re going to have a hard time coming up with a VALID reason to induce. If they still keep bringing it up you can even say “But I thought you weren’t supposed to induce unless the health of the mom or baby is in true danger?”. You could also mention the Harvard study of 41 weeks and 1 day being the average for first time moms, NOT 40 weeks (and if 41 is the average, then that means that just as many moms go past 41 weeks as they go before it).

Bottom line–force them to give you a legitimate reason for induction–not just because “that’s what we do at our practice”. Every mom and baby should be treated on a case by case basis…not “according to rule”.

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29 KERF July 9, 2012 at 3:13 pm

Ok. Perhaps I’ll print out that study to bring in if need be : )

30 kate July 9, 2012 at 1:52 pm

My midwife told me 41+1 for first time moms too. I had my daughter right at 41 weeks. I would refuse induction before 41+4

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31 Nicole July 9, 2012 at 2:05 pm

I agree Kate! I had my first and second at 41 weeks and 1 day exactly! People need to realize that the Academy of Obstetrics and Gynecology state that inductions should ONLY be done if the health of the mother or baby is in danger…not because a mom is tired of being pregnant, a baby is suspected to be “big” (remember–fat is squishable!) or the OB has someplace to be or a vacation to go on. If mom and baby are doing fine, there is NO reason to do ANYTHING. And be very wary of the whole “low amniotic fluid” BS being given these days as a need to induce! Fluid varies from hour to hour and is also dependent on how much water a mom drinks and whether or not the baby has peed recently. SO tired of my childbirth students being induced for this relatively new reason!

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32 KERF July 9, 2012 at 2:23 pm

I wish we were all educated on the secondary types of reasons – like this low fluid. If my doctor told me my fluid was low, I”d be like “omg induce!” but it’s good to know it’s not necessarily a huge threat. Are there other reasons you can think of Nicole that doctors use that might want a second consideration?

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33 Kimmy July 9, 2012 at 7:40 pm

I know this is an anecdotal story, but when I had my daughter I was a week and a half late and I was induced. I had wanted a natural birth, and my doctor said that the larger the baby is–the more likely a c-section is. My sister, who had waited to go into labor naturally and was two weeks overdue, had just delivered through a c-section because her baby was a monster 11 pounds and after a day and a half of pushing, he just wasn’t coming. Therefore I was induced, I had a lovely baby girl later that day without any medication. Inducing isn’t always the horror story crunchy mothers portray it as…

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34 KERF July 9, 2012 at 7:42 pm

It’s good to hear more successful inductions. Did you have pit?

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35 Alicia July 9, 2012 at 8:18 pm

I was induced on pit after my water broke and labor didn’t start. I had a med-free birth (until my placenta didn’t detach) My body took to the pit quite well and frankly it was nice not to have to worry about labor stalling!

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36 KERF July 9, 2012 at 8:28 pm

Glad to hear it

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37 Shelly July 9, 2012 at 8:44 pm

I had two successful inductions. Turns out, for me, that’s the only way my babies will come as I do not contract on my own. My water broke (both times the day before my due date) and never a single contraction. Because there was meconium in the fluid they had to induce after a certain time. Not a single contraction on my own. Even when they turned off the pit as I was pushing (or about to push…can’t remember) my contractions completely stopped. They had to turn it back on and wait for them to start again. This was almost identical with both of my labours. I say almost because with the first it was unknown and scary and the second was easy because I told the nurses what would happen at each stage. I also had a mild epidural (could feel everything but wasn’t as painful) with each because I wasn’t progressing…stuck at 4ish for hours and hours (I know I know…typical intervention story). But within 5 minutes of epidural I went from 4c to 10cm and was completely ready to push….of course then the nurse turned off the pit and the contractions stopped…but that’s another story.

I definititely was anti-intervention from the beginning (with supportive doctors) but for me it all worked in my favour. So I guess what I’m saying is just take it as it comes and be prepared for everything. Trust in yourself and your team and you’ll be fine. BTW both babies were born on their due dates (calculated on conception).

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38 Jenny July 9, 2012 at 9:10 pm

I did the castor oil thing (on my midwife’s request). It was so disgusting after I got it all down, I couldn’t keep it down so it obviously didn’t work that time. Lol. She had me do it again the next day. It gave me severe diarrhea and then hemmorrhoids-wasn’t pleasant at all! I will never do it again!!! Sex, on the other hand, sent me right into labor;-)

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39 Kris July 10, 2012 at 11:11 am

+1
Castor oil = :(
Bone zone= :) + baby

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40 Kate L. July 9, 2012 at 11:08 am

Yes – I thought I was the only person that thought it was a bit early to push induction on women too. Of course, the doctor can advocate for whatever he wants, if I want to give the baby a few more days past the 41 weeks (and medically there are no signs of distress) then I would just tell that doctor to take a chill pill.

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41 Sarah July 9, 2012 at 9:38 am

I didn’t chart temperatures when we started trying to get pregnant – I used an app that told me based on the start of my last cycle when I would be likely ovulating. I was going to start using an ovulation kit, but then I got pregnant!

I knew my last cycle start date, but wasn’t exactly sure when I ovulated. Our baby measured slightly bigger on ultrasound that my due date, but I figured that was just because my hubby has a large head!

Christopher arrived at 3 am on his due date. I don’t expect to be that exact when we have the next one!

I think I mentally knew after we hit 37 weeks that it could be any time – so we just stayed close to home, kept nesting and waited for the baby. Funny thing was, the day I started early labor (Monday, he was born Wednesday), I got myself in gear at work and finished all the last minute things I needed to do. Good thing, since I went out the next day!

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42 polly July 9, 2012 at 9:48 am

no worries! i had my girl early and some go way over and as long as he comes out ready to eat some bread, you’re good. :o) love you guys!!!!!!!! XO

*i am cheering for Karen’s birthday grandson date! ;)

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43 Julie H. of Spinach and Sprinkles July 9, 2012 at 10:19 am

I am soooo nervous about baby coming early and not having anything ready. Then two seconds later, I get sooo nervous about the baby being two weeks late….. I know when the baby was conceived and implanted (due to infertility- it was a science to get pregnant) so they are certain of the due date and it matches up with baby’s size…….. But, babies do what they want. I’m just getting so anxious!!!

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44 Jessie @ Graze With Me July 9, 2012 at 10:39 am

I’m a late ovulater as well. I was charting for three months before we conceived and my cycles were 37 days long with an ovulation on day 26. If I hadn’t been charting my due date would have been Sept 2nd instead of the 14th! Seeing how my water broke naturally on Sept 18th (& my baby was 6lb, 14oz!) I’m sure glad I had that info or I would’ve been unnecessarily induced much too early.

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45 Jayce July 9, 2012 at 10:53 am

My baby boy was born at 41 weeks 6 days (though I also know based on ovulation that my EDD was off by about 4 days – so maybe born at 41+2?). My OB practice also induces at 41 weeks but were willing to wait it out with me because I was very politely vocal about my thoughts on induction. I’m so glad I waited! I trusted my body, and I ended up having a natural birth – on Father’s Day! Hopefully you will go early/on time, but if not I strongly encourage waiting a little longer, because as you said babies come when they’re ready!!

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46 Jayce July 9, 2012 at 10:57 am

Oh, and beware of weight estimates! An ultrasound at 41 weeks predicted my son was 8 lbs, 15 oz, and he was born 6 days later weighing 7 lbs, 11 oz! Way off!

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47 Lee July 9, 2012 at 5:23 pm

Yes … weights based on US are *estimates* as the US can only really measure the bone and not the chub (or lack thereof) around the bone.

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48 Debbie July 11, 2012 at 9:01 am

Definitely be wary of any weight estimate given, I agree! My boy was estimated to be a 10.5 – 11lb baby if I carried him to 40 weeks. I was induced early due to some complications and at 39+2 he weighed in at 7lb 9oz. So yeah, very big difference.

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49 Jessica July 9, 2012 at 11:17 am

I am thinking along the same lines as you! I am due on October 19 based on my LMP. But, I know when I conceived because I had been closely tracking and based on that my due date is October 29. My doctor won’t let me go past 41 weeks so it is possible I will be induced before what is even (in my opinion) my true due date. I am planning on talking to my doctor about the fact that I think the 29th is my actual due date as it gets closer because I really don’t want to be induced but at the same time don’t want to do anything to risk the baby…It is definitely something to think about.

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50 Kate L. July 9, 2012 at 2:50 pm

Just ask to have stess tests done and fluid tests (and others they offer). There is no reason for there to be this cut and dry policy of inducing at 41 weeks – all womens cycles are slightly different, delivery timing/dating is NOT an exact science, and unless there are obvious reasons to do it sooner based on *your* particular situation, there is no reason why you can’t push it a little closer to 42 weeks. Just be willing to do some tests and let doctor know of your concerns – don’t just accept that that’s how things are done. Good luck and good health!

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51 Jessica July 9, 2012 at 3:29 pm

Thanks! I will definitely do that.

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52 Amy @Macncheesenpeas July 9, 2012 at 11:59 am

I was a labor day baby, and I was also born on my parent’s third wedding anniversary! whatever day the baby comes will be the perfect birthday!

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53 Nicole July 9, 2012 at 12:38 pm

Naegels Rule is outdated ;) The average pregnancy for first time moms actually lasts 41 weeks and 1 day, not 40 weeks. This was found to be true in a study conducted at Harvard on first time moms. After teaching childbirth classes for the past 10 years, I can attest that MOST first time moms at least go to 41 weeks and most even go longer. I’d be wary of OBs who routinely induce at 41 weeks–mostly because it shows they aren’t taking the latest research into account. Just remember that you can refuse ANY intervention and it’s better to err on the side of the baby when it comes to his due date since labor is thought to be initiated by the baby’s lungs releasing a hormone telling your body that they are ready to be born and their lungs are ready to take their first breath :) Here’s the abstract from that study- http://www.ncbi.nlm.nih.gov/pubmed/2342739

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54 Kate L. July 9, 2012 at 2:53 pm

Thanks for all the advice on here today. I’m pregnant with #3 and if this one is as ‘late’ as #2, I’ll need some info in my court in case this doctor wants to pressure me into going sooner. My last doctor was great – we agreed on an induction for 42 weeks, though I hoped and hoped it would happen on it’s own. It did with just 2 days to spare and baby and I did great.

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55 Amy July 9, 2012 at 1:00 pm

I’m due on 9/4 with my 3rd baby. With my first, I was ready to deliver once I hit 37 weeks only to be induced 11 days past my due date. Essentially, I was waiting on pins on needles to go into labor for almost 5 weeks! Try to not to expect to go into labor early. You might end up driving yourself crazy with the waiting.

I second an earlier poster about not trying the castor oil. I’ve heard many horror stories about it. Plus, while it may start contractions, they might not materialize into anything significant. My dr reco’ed walking and exercise to avoid another induction with my 2nd. That combined with stripping my membranes at 39 weeks did the trick.

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56 Kate L. July 9, 2012 at 2:55 pm

Yes, of all the advice I’ve heard, walking is by far the best advice for (possibly) starting labor. It’s safe (if you don’t crazy over-do it), healthy, and a good idea to do no matter what.

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57 Averie @ Averie Cooks July 9, 2012 at 1:14 pm

38w1d for me. And I ovulated late like you did. Not quite that late, but past day 14. There is just no telling when baby will want to come out and your body will say, yep, it’s time. I honestly didn’t think I’d go early because everyone says first babies are rarely early; well…mine was!

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58 Leslie July 9, 2012 at 1:37 pm

Have you heard about the lemon cupcakes at Cappellino’s? Do a google search for their lemon drop cupcakes….supposedly, many Cville women have gone into labor after eating them! If I were pregnant and overdue, I’d definitely try that avenue first :)

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59 KERF July 9, 2012 at 1:42 pm

I have!!

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60 Erin July 9, 2012 at 2:31 pm

We waited until 41 weeks and little Ryder was still comfy and I was only at a 1cm on my induction day. But, it was nice knowing we had waited as long as they would let us. May you have a really great delivery. It was so much like a party (bday party!) when he was born in May.

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61 Claire July 9, 2012 at 3:07 pm

The current research done on delivery dates suggests that the fetus induces labor based on the volume of surfactant production in the lungs – not the “age” of the egg. Since all babies grow at slightly different rates, you can’t pinpoint the date of delivery, even if you know the moments of conception and fertilization.

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62 KERF July 9, 2012 at 3:11 pm

Right but would a baby’s lungs develop faster if the egg is older?? That’s my question. WHAT determines the surfactant production and when? Chance? Mom’s diet? Baby’s position?

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63 Claire July 9, 2012 at 3:35 pm

I’m not sure what you mean by the egg being “older” as all eggs are the same age…? Are you talking about maternal age? Remember, the egg is a single cell, and until fertilization and the creation of the zygote there isn’t even the possibility yet for the development of lung cells, so I can’t really see how the age of the egg would have any effect unless you’re dealing with advanced maternal age and the quality of the eggs have decreased?

I haven’t done a lot of reading of the current research, and I’m not a biologist, but I would hazard a guess that each baby grows at a slightly different rate, simply based on the fact that no two humans are the same, and they grow at different rates post-delivery as well. Genetics would be the largest influencing factor, I would guess, and I would bet the environment is a factor as well. I can’t imagine that the baby’s position would have any possible affect unless you count the negative effect of cord prolapse, etc. I imagine if you Google something like “lung surfactant triggering labor” you’ll get a number of articles you can read up on, if this is something you’re interested in.

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64 Samantha July 9, 2012 at 3:28 pm

http://www.ncbi.nlm.nih.gov/pubmed/2248600
” Surfactant glycerophospholipid synthesis in fetal lung tissue is regulated by a number of hormones and factors, including glucocorticoids, prolactin, insulin, oestrogens, androgens, thyroid hormones, and catecholamines acting through cyclic AMP. In studies with human fetal lung in organ culture, we have observed that glucocorticoids, in combination with prolactin and/or insulin, increase the rate of lamellar body phosphatidylcholine synthesis and alter lamellar body glycerophospholipid composition to one reflective of surfactant secreted by the human fetal lung at term.”

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65 KERF July 9, 2012 at 5:03 pm

Neat, thanks

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66 jane July 9, 2012 at 3:33 pm

august 31 is a great day-my birthday!!! honestly though I just think late summer is a GREAT time to have a baby; summer is winding down and you’ll have a new family member to show off for the fall holidays. however by thanksgiving the baby will be old enough to be around a lot of other people so you wont have to worry about germs and their little immune systems as much :-)

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67 Elizabeth July 10, 2012 at 11:17 am

Late summer is a great time to have a baby! And you saying so brought tears to this 35 week pregnant woman’s eyes. My two year old was born in May and “people on the street” (literally, strangers) loved her birthday month. With this pregnancy (due around Aug 15) people are so negative and nasty about being pregnant in the summer, how uncomfortable I must be, etc. Dude, I live in Colorado. It’s not the hot here. Also, I planned this (luckily it worked out) so that I could have an inside baby during the hot months and take my baby for lots of walks and enjoy the fall (and holidays) on maternity leave. OK, end rant. It’s just weird how people’s negativity can affect you – not in a way that makes me second guess (that ship has sailed, lol) but in a way that makes me ANNOYED with EVERYONE. Or that could be the 35 week hormones talking! Anyway, thanks for the positivity.

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68 Andrea @ The Skinny Chronicles July 9, 2012 at 5:03 pm

Oooh I really hope I am not later then 40 weeks. My fingers are crossed big time. Seems like it is so common for folks to be late though…

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69 nicole July 9, 2012 at 5:12 pm

I was induced with all of my children. Number 5 was 10 days late and I had to fill out a form knowing my risks to being induced. I’m totally fine with going 14 days over however I do worry about the placenta and it’s ability to function.
I think half of the fun is the waiting and watching to see if this is really it in the last few weeks of pregnancy. The good thing is you won’t be pregnant forever. The baby has to be born. :)

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70 Kellie July 9, 2012 at 8:12 pm

My oldest son will be 2 on Aug 26! That would be a great day ;)

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71 mary lou baker July 9, 2012 at 9:15 pm

That’s great your doctor went by your calculations for a due date. My due date was August 9 but because I ovulate late, I always went by the date of August 15. I had been keeping track for years and had a good idea about conception (in fact our son was conceived the month we had fertility treatment first scheduled-thank the good Lord). Well, at 38 weeks the dr. said I could go into labor any time now. I replied that I expected it to be closer to the 15th. He laughed and said that he was on call that day, so that would be fine. Guess what happened in the early morning hours of the 15th? I went into labor (knowing exactly which dr. would be there) and had my son that night. I had the last laugh! Of course, it doesn’t always work out that way. I wish you the best!

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72 Ashley M. [at] (never home)maker July 9, 2012 at 9:58 pm

I think this whole part of pregnancy is fascinating. The WHEN it all happens. Great post! And no matter what, you are going to be so surprised when you go into labor! It’s crazy because all of a sudden it’s like “WOAH! IT’S HAPPENING!”

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73 Hotpotatokate July 9, 2012 at 10:04 pm

My boy came at 38+6. Labor started with my waters breaking, and although contractions started quickly and he was born very healthy, I always feel that he might not have been quite ready to join us. I’d had an active day that day, and couldn’t help but wonder if I unwittingly encouraged him out too soon. No biggie, but I’m definitely loathe to do anything to encourage labour in future unless it’s necessary to avoid a medical induction!

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74 Ally July 9, 2012 at 10:56 pm

Glad to hear you have a doctor who waits at least until 41 weeks. My doctor asked me at 35 weeks if I would like to go ahead and schedule an induction for 37 weeks! I’m a nurse and I hear about that happening all the time. I’m sure everything will work out just fine for you.

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75 jen July 10, 2012 at 8:29 am

I may have already mentioned this, so ignore this if I have. But I had active labor start at 35 weeks for no known medical reason. Perfectly healthy pregnancy and baby, progressing as expected. My own opinion is that I started labor for 2 reasons: 1) I got a bit dehydrated. But I don’t think that would have been enough wihtout 2) I spent an hour holding a friend’s newborn (the day before) baby just hours before my water broke and labor started.

I haven’t found any science to back me up, but I’m convinced holding that brand new baby gave me some crazy hormone surges that combined with my mild dehydration to kick start labor. And just in case… I will not be holding any little babies when I’m near term with my next little one!!! :)

And on the top of today’s post and unneeded procedures. My girl was breech and my hospital requires c-section for breech babies. Bummer! But all’s well that ends well!

And you certainly have all your ducks in a row in case your little one does show a bit early. We hadn’t even packed a hospital bag yet.

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76 KERF July 10, 2012 at 8:48 am

I was holding a 3 month old at my shower on Sunday and my baby started kicking like crazy! Hormones there?!

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77 Fran July 10, 2012 at 9:46 am

I would love to see an example of a 26 week old being born healthy.

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78 KERF July 10, 2012 at 9:56 am

They mean long term they were healthy – not that they didn’t need lots of support in the NICU when they were born

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79 Angel7 July 10, 2012 at 12:54 pm

I wonder what day your little babe will be born. You probably are right on track with the due date calculation. I wish I would have done that just to know if the date I determined and the date the doctor told me are the same.

http://faithfulsolutions.blogspot.com/

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80 Sara July 10, 2012 at 2:30 pm

It wouldn’t be all bad if he was a little bit late. I don’t know what the cut-off date for kindergarten is where you live (here in Texas, the child must be 5 years old before September 1 to enroll in kindergarten), but since he’s a boy, it could be good for him to be one of the older ones in class. Boys are generally more immature than girls when they’re little (oh, who am I kidding, they’re ALWAYS more immature!), so it can be an advantage for them to be older in their class. Of course, if he doesn’t quite make that cut-off, you could always hold him back, if it turned out to be a concern.

Our son was a late April birthday and has always hit his “maturity markers” right-on-time, which ended up putting him behind almost everyone in his class. He’s going into 4th grade this coming year and I think he’s almost finally caught up.

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81 Diane July 10, 2012 at 5:24 pm

With my first baby I had the same issue – I knew I ovulated later so my due date was wrong. I got to 40 weeks based on the LMP and we scheduled an induction because an ultrasound showed dark spots on the placenta and low fluid. I ended up going into labor naturally before the induction, but my placenta had in fact degraded, even though it was only a little past 40 weeks from my LMP (and exactly 40 weeks since ovulation). There was also meconium, which tends to happen more after 40 weeks. So just make sure to get an ultrasound if you bump up against 40 weeks.

I had heard a wives tale that walking up and down stadiums can cause labor, and funny enough my hubby and went to a baseball game the night I went into labor with my first.

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82 Jenna Newberry July 10, 2012 at 9:51 pm

Thank you for all the great info you have posted in this article and generally in your blog. I did not keep great detail to help support or disprove my due date, other than I did know details of my last period..woohoo! I am due August 23rd and, like you, feel I could be a bit early. As August approaches I am becoming so excited to learn how this final month will play out. I am so eager and anxious all at once, yet feel ready for all challenges that are ahead. Best wishes to you :)

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83 Lindsay McAlester July 11, 2012 at 8:12 am

Every first time mom ‘thinks’ she will deliver early. I think it prepares our mommy brains for anything! :) My first child was born 2 days early. My water strating breaking in a public place…wasn’t as bad as it sounds. ;) My second child, induced 11 days early. I wasn’t in a particular rush, but something said it was time. My son was 8 lb 13oz. I felt like I made the right decision for me.

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84 Jen July 11, 2012 at 9:42 pm

SO interesting! I ovulated on day 24, so the egg age theory explains why W was early. I’m so interested to see when you’ll go into labor!

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85 Krystle July 11, 2012 at 11:29 pm

Inducing at 41 weeks is nuts. You don’t have to be induced then if you choose not to. Give 42 weeks if you want to avoid induction!!

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86 Kathryn July 14, 2012 at 9:37 pm

Wow, I just had to comment on similarities of our dates……I’m due August 30, but August 26 would be nice since MY birthday is December 26! My mother-in-laws bday is Sept 3 (although I hope I don’t have to wait until then!). And of course Labor Day would be an ironic day to give birth. Funny!

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87 KERF July 14, 2012 at 11:56 pm

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