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A 20-year-old female asked:

I have been off birth control for four months and want to start again how long will it take before its safe to have sex.?

2 doctor answers3 doctors weighed in
Dr. Michael Swor
Obstetrics and Gynecology 40 years experience
Soon: Generally, if you start most hormone contraceptives on the first day of your period, you get excellent effectiveness. Full effect with all hormonal contraceptives can be relied on after 1 month.
Dr. Prerana Sangani
Internal Medicine 24 years experience
1 full cycle : We recommend one full pack of pills to be safe. During the first month back on the pill you should use back up contraception such as a condom.

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Last updated Dec 16, 2014

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