EVERYDAY SCIENCE

Detailed explanation-1: -Pregnancy lasts for about 280 days or 40 weeks. A preterm or premature baby is delivered before 37 weeks of your pregnancy. Extremely preterm infants are born 23 through 28 weeks.

Detailed explanation-2: -Pregnancy is counted from the first day of your last menstrual period. This means an extra 2 weeks are counted at the beginning of your pregnancy when you aren’t actually pregnant. So pregnancy lasts 10 months (40 weeks)-not 9 months-because of these extra weeks.

Detailed explanation-3: -The short answer is 280 days, 40 weeks, 3 trimesters, or a little more than 9 months.

Detailed explanation-4: -Pregnancy: 270 days = 3 trimesters. A pregnancy lasts an average of 40 weeks (270 days). This is divided into three pregnancy trimesters. Every trimester lasts about 3 months.

Detailed explanation-5: -Is pregnancy nine or 10 months long? Your 40 weeks of pregnancy are counted as nine months.