Picture of Third Trimester (37-40 Weeks)

Third Trimester: The Baby at 37 to 40 Weeks

By the end of 37 weeks, your baby is considered full term. Your baby's organs are ready to function on their own.
As you near your due date, your baby may turn into a head-down position for birth. Most babies "present" head down.
At birth, your baby may weigh somewhere between 6 pounds, 2 ounces and 9 pounds, 2 ounces and be 19 to 21 inches long. Most full-term babies fall within these ranges. But healthy babies come in many different sizes.

Reviewed by William C. Shiel Jr., MD, FACP, FACR on August 21, 2009

Image Source: iStockphoto / Don Bayley

Text: Womenshealth.gov - Healthy Pregnancy: Stages of Pregnancy