[wizeman]

> 1/2 correct - 40 weeks is 10 months from conception to birth.

Sorry, is this a cultural difference or are you just nitpicking math?

Even Wikipedia says: This is just over nine months.

I have never seen anyone argue that pregnancy takes 10 months in humans, I've always heard people say it takes 9 months (indeed, being 9 months pregnant is equivalent to saying you're just about to give birth, where I come from).

[canemacchina]

Nope, 40 weeks is the correct answer. Usually, the calculation is done from the first day of the last menstrual period, and from the medical point of view, we consider 40 weeks of pregnancy (even if doctors consider a period between 38 and 42 weeks a normal pregnancy). 40 weeks are exactly 280 days, that are ~9 months. So for this reason we say that the pregnancy is 9 months, but doctors usually say 40 weeks.