Third Trimester (27 to 40 Weeks)

Is third trimester 27 or 28 weeks?

The third trimester of pregnancy starts in week 28 of your pregnancy and lasts until you give birth, which is around the 40th week.

Does Week 27 start the third trimester?

A pregnancy is divided into trimesters: the first trimester is from week 1 to the end of week 12. the second trimester is from week 13 to the end of week 26. the third trimester is from week 27 to the end of the pregnancy.