I do think there is something to this, though I think part of it is probably cultural rather than strictly physiological. As in if your mother had a certain birth experience or birth tends to happen a certain way in your family, that's much more normal and expected for you, so history tends to repeat itself. Our beliefs are very powerful and what's normal has huge variation, but stories passed down about birth can have a real impact in your life if you buy into them.
In my case, I don't know anything about any other women in my family, but my daughter's birth (my first) was very similar to my mother's experience with me (her first and only). We both went on the earlier side. I was born around 38 weeks and my daughter was 37+5. Both completely natural, started with waters breaking in the middle of the night and labour was really manageable. I had a home birth, but I was really comfortable until the end when I was pushing. With me, my mum's waters broke about 1am and she was at a cafe on the way to the hospital waiting while my dad had breakfast at 9am. They got to the hospital a bit after that and I was born at 1pm. So both really manageable and straightforward and almost exactly the same length with waters going first.
It was also our first babies, we both wanted a natural birth, we were close to the same age, equally healthy and physically active all through pregnancy, so very similar in a lot of ways. But realistically, I think a lot of that probably also had to do with just being raised to know my mum had a fairly easy, straightforward natural birth and expecting the same. She has always told me the story of stopping to have breakfast on the way to the hospital and the waitress actually dropped and broke a coffee mug when she told her she wouldn't be eating because she was in labour! So I think it was just the norm and that's what I expected. Similarly, my husband's family has had almost all natural, easy births, many of them home births (including our daughter's too), and his granny had 4 of her 5 babies at home. It's just the norm. So I think there is something to that, in addition to there being physiological similarities. Also, realistically, most first babies are born at 41 weeks if left naturally to come when they're ready, so it's not so much they are 'overdue' as on time based on the averages, so to an extent it just skews that way anyway. The ones that come early, like me and my daughter, are more the exception, even if we did seem to follow a pattern.
I think there is a lot of truth to birth trends in families. My mother was about a week early and had her waters break just before going into labor with both me and my sister. With my daughter I was 6 days early and also had my waters break first. I hope it will be the same this time around.
Kind of for me. I went 11 days over, my mum went 2 days over with me but 11 days over with my youngest brother (who I share my birthday with!) However though my OH's mum was early with her first (my oh) and last.
But BOTH my mum and his mum were on their due dates with their middle kids so hopefully if I have a 2nd in future they will be on time!
My mom knew that women in her family were late deliverers, so when they told her her due date with me (her first), she said "add 2 weeks to that". And she was pretty much bang on. The day she was gonna be induced, she actually went into labour on her own. And she laboured for about 36 hours. She was late with my sister as well, but she thinks it may have been cuz the cord was wrapped around her neck and she just wasn't dropping low enough to deliver vaginally.
My sister was induced with her son, but 20 days early cuz she was too much of a selfish dumbass to take care of herself and go on insulin for her gestational diabetes. (Please don't think I'm being mean. She's been a huge bitch since she was a child and she's just gotten worse with age). She laboured for about 22 hours.
So, my due date is July 22, but I wouldn't be surprised if I actually deliver in early August. I just hope my labour won't be that long.
The only trend for my mom and I is giving birth to small babies. I weighed 6 lbs, as did both my children. My mother had a long labor with me, 24 hours+. With both my children I labored for about 8 hours, and pushed them both out in less than 5 minutes.
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