Hi,
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If you stop with the birth control pill use, sometimes your fertility can early (depending on type and duration of birth control use) after you stop with birth control use. If you have intercourse without additional protection, you can get pregnant anytime if your fertility has returned back to normal (especially during your fertile days). If you intend to remain sexually active after stopping with the hormonal birth control use (and yet not ready for pregnancy), then discuss about other methods with your gynecologist and get started on the suitable one.
Take care.