Your the idiot! I know damn well actual pregnancy starts at conception, but OBGYN's count pregnancy from the 1st day of the last period before conception, making it a 40 week pregnancy.
I've had two boys, and two miscarriages and know exactly how OBGYN's determine weeks of pregnancy and it is never by gestation!
Whenever Elizabeth Smart started a period is irrelevant to the discussion. The only question is whether or not she could have conceived and birthed a child in the time period while she was being held hostage.
The answer is "Yes!" it is possible, because the human gestation period is 38 weeks or 8.85 months.
A random definition of "pregnancy", by American Doctors, does not change the fact that gestation begins at conception and ends at birthing.
And by the way, 40 weeks are not 10 months. If a month were to consist of 4 weeks, then there would be 13 months in the year. 52/4 = 13.
Ouch....wrong time to use improper grammar.