The placenta grows during pregnancy and stays connected to the wall of the uterus where it provides the fetus with nourishment. The placenta also secretes hormones that help regulate and maintain the pregnancy.
Review Date 10/5/2020
Updated by: John D. Jacobson, MD, Professor of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda Center for Fertility, Loma Linda, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. 10