How long does it take birth control pills to start working?


According to WebMD, birth control pills are normally effective after the first month a woman takes them. It is recommended to use an additional method of birth control during the first month.

Birth control pills contain hormones that inhibit a woman's normal cycle and prevent her body from becoming pregnant. Taken correctly, birth control pills are up to 99.9 percent effective. A doctor advises a woman on when the pills should be started.

Typically, a woman begins birth control pills the first Sunday after a menstrual period starts, even if she is still bleeding. After 1 month of taking the pills, backup forms of birth control are not needed. Women can rely solely on the pill for pregnancy protection.

1 Additional Answer Answer for: how long does it take for birth control pills to start working
Birth Control Learning Center
Birth control prevents pregnancy by stopping different parts of the pregnancy process. Hormonal methods—like birth control pills, the patch or injections—release synthetic hormones into the body to prevent the release of eggs during ovulation... More »
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