How many weeks long is a full-term pregnancy?
The African Bush Elephant has the longest gestation period of any mammal, with the mama-to-be being pregnant for 22 months. This is a total of 88 weeks! We think every pregnant woman will thank her lucky stars humans are not pregnant for that length of time. On the other hand, the opossum has one of the shortest gestation periods, at just 12 to 13 days. Since we are growing humans and not baby opossums or elephants, how many weeks long is a full-term pregnancy?