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A Peek Inside: 5 Amazing Fetal Development Photos

28 to 41 Weeks - Third Trimester

28 to 41 Weeks - Third Trimester

Towards the end of your third trimester, your baby's internal organs are fully developed and it can survive outside the womb. Its lungs are collapsed and ready to expand with a first gasp of air after birth. Weighing in around 6 pounds, it's become quite cramped in its current home and is ready to enter the world.

By Katherine Solem. Published on July 12, 2010. Updated on November 23, 2015. Katherine Solem is a San Francisco–based health writer and editor.
Reviewed by Elisabeth Aron, MD, FACOG on October 5, 2015.