How much will my baby develop during the first trimester?

How much will my baby develop during the first trimester?

Jay Goldberg (Obstetrician/Gynecologist, Cedars-Sinai Medical Center) gives expert video advice on: How do I determine my baby's due date?; How do I alleviate my nausea during my pregnancy? and more...

Your baby does quite a bit of development in the first trimester, and it's actually developing quite heavily before it's even detected on ultrasound. The baby is actually initially a plate, and then it forms a tube, kind of rounds itself off. That whole process takes place in the first six to eight weeks of pregnancy. So, there's a lot of development that occurs in the first trimester; in-fact, most of the development occurs in the first trimester. It's the second and third trimester where the baby is simply just growing in size, because most things have developed at that point and it's the size that's going to increase at that time.