Average length of pregnancy, ovulation to birth is 268 days -- 38.3 weeks.
But we typically count pregnancy from last period (this is easier), which makes it pretty close to the round 40 that's usually cited.
> 40 weeks is 10 months from conception to birth.
A month is ~4.35 weeks, so 40 weeks is ~9.2 months.
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).
Months vary in length, 9 average months (1/12 year per month) is. 39.1+ weeks, 10 is 43.4+ weeks; 40 weeks is closer to 9 months.
So, let’s see whether ChatGPT gets the wrong answers:
1/2 correct - 40 weeks is 10 months from conception to birth. 1/2 correct. It seems to alway agree with the question’s framing - humans would often disagree. 9/10 for that answer!