Birth control pill - series
From DrKoop's partner site on cholesterol, CholesterolNetwork.com
Progestin in pill 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: 09/19/2005  advertisement
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