Dictionary  birth'-con•trol pill"Pronunciation: (bûrth'kun-trōl"), [key] an oral contraceptive for women, containing the hormones estrogen and progesterone or progesterone alone, that inhibits ovulation, fertilization, or implantation of a fertilized ovum, causing temporary infertility. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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