05/18/2023
Have you been told that you "need" to be induced if you go past a certain weeks gestation?
Have a look at this info from https://www.intentionalbirth.co/
"I had to be induced with both of my babies. My body doesn't go into labor on its own." These are the words one of us heard from a close family member. It's a story she was told about her body—by her doctors, by her culture—that she has believed her whole life.
It's false.
Still today, being "overdue" is the most common reason women are induced. A physiologically meaningless date suddenly becomes very, very important when you are asked to base a huge medical decision on it.
So let's look at how that family member's due dates were calculated (and how they still would be today). In 1812, German doctor Franz Naegele proposed, based on no evidence whatever, that pregnancy is 10 lunar months (280 days). His method adds 9 months and 7 days to the date of a woman's last missed menstrual period, with the assumption that a woman has a 28-day cycle and ovulates on day 14. Voila! We have our 40-week pregnancy!
Problems abound with Naegele's method. Not every woman has a 28-day cycle. Not every woman knows the date of her "last missed period." Not every woman ovulates on Day 14. Not every embryo will implant at the same time.
It's hard to believe that we've stuck with Dr. Naegele for over 200 years now! It's time for an update.
Here's our preferred method of due date calculation, developed by Yale professor of nurse-midwifery, Carol Wood Nichols (Nichol's Rule):
When was your last missed period? Add one year to that. Then:
First-time mom? Subtract 2 months and 2 weeks.
Second-time mom? Subtract 2 months and 18 days.
If your cycle is longer than 28 days:
Subtract 28 from the length of your average cycle.
Add that number of days to your estimated due date (calculated above).
If your cycle is shorter than 28 days:
Subtract the average length of your cycle from 28.
Subtract that number of days from your estimated due date (calculated above).
The result will still be a "due date" that doesn't take into account all of your lifestyle, health, and genetic factors. But it will get you closer than our friend Naegele.
Fun fact: in France, a woman's due date is considered to be 41 weeks!"
Here at Intentional Birth Co. we believe that a positive birth is every woman's birthright. Learn more about modern childbirth education, call us now!