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How long does birth control take to go into effect?

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Okay so I just got birth control a little less then a week ago. I had taken 4 pills then had unprotected sex for no longer then 30 seconds. He did not cum at all. I'm still worried that I could be pregnant. How long does birth control take to go into effect? Please help I'm very worried.

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replied September 5th, 2012
Am I Pregnant Answer A38371

Welcome to ehealthforum amd thanks for writing

Birth control pills are to be taken continuously for a minimum of one week and then its contraceptive action statrts. It is not advisable to have unprotected contact so early as pregnancy is a possibility. If it has been less than 72 hours of the act then consider taking emergency contraceptive pill for protection from pregnancy.

Even if the penetration was for less time but ejaculate contains milions of sperms capable for fertilization.
Kindly take the pills regularly for a month and then have any unprotected contact.

Take care!

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