Due Dates

Don’t Count On Pregnancy Due Dates

Pregnancy due dates are not accurate. They are determined based upon Naegele’s rule, a system from the 1800’s created without any scientific research.

Multiple factors determine the gestational period of humans, and they vary based upon a woman’s ethnicity, height, weight, age, length of menstrual cycle, day of ovulation, and so forth. The current thinking is that it is time to move away from using Naegele’s rule and stop giving women a precise date.

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