Medical Encyclopedia
Birth control pill - series: Release of estrogen
During a normal menstrual cycle, hormones stimulate the ovary causing an egg to ripen. The uterine lining thickens preparing itself for implantation of a fertilized egg and the cervical mucus thins to help sperm reach the egg.
Update Date: 5/6/2007
Updated by: Rachel A. Lewis, MD, FAAP, Columbia University Pediatric Faculty Practice, New York, NY. Review provided by VeriMed Healthcare Network.
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