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URL of this page: //medlineplus.gov/ency/presentations/100108.htm

Birth control pill - series—Progestin in pill

Progestin in pill

Overview

The progesterone in birth control pills creates a thick cervical mucus, making it difficult for sperm to reach the uterus. It also impedes an egg from attaching itself to the uterine lining (endometrium) because of changes in the cellular structure of the lining.

Review Date 3/31/2024

Updated by: LaQuita Martinez, MD, Department of Obstetrics and Gynecology, Emory Johns Creek Hospital, Alpharetta, GA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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