Inthemiddle
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- Oct 4, 2011
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- #541
"Oral contraceptives are designed to prevent pregnancy in one of three ways:
Prevent ovulation each month.
The cervix produces less and thicker mucus so that sperm cannot easily enter the uterus.
The lining of the uterus becomes thinner, making it more difficult for a fertilized egg to attach to the uterus should ovulation occur and fertilization take place. "
Oral Contraceptives: Birth Control Pills : American Pregnancy Association
How Birth Control Pills Prevent Pregnancy
Facts About Abortion: Can Birth Control Cause an Abortion?
That's not what Plan B does. It prevents ovulation from occurring. If it's taken after ovulation has occurred, it is ineffective at preventing pregnancy.