Question

The length of human pregnancies varies. On average, how long is a human pregnancy from conception to birth?

A) 36 weeks
B) 38 weeks
C) 40 weeks
D) 42 weeks

Answer 1

A full-term pregnancy lasts approximately 40 weeks from conception to birth, and is divided into three trimesters. Obstetricians calculate the due date as 284 days from the first day of the last menstrual period.

Step-by-step explanation:

A full-term pregnancy lasts approximately 270 days (approximately 38.5 weeks) from conception to birth. Obstetricians typically set the due date as 284 days (approximately 40.5 weeks) from the first day of the last menstrual period (LMP). The average duration of pregnancy is 40 weeks, which is divided into three trimesters of about three months each.