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How soon does antibiotics make birth control pills less effective?


Posted by ConcernedStu11

I am on birth control pills. the day after my last sexual encounter with my fiance I was placed on antibiotics by my doctor. How soon does antibiotics make birth control pills less effective? How soon would I be able to tell if I am pregnant?
 
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it depends on what the quality of your cervical fluid was and where you were in the pack. 

Sperm will only survive in a non-fertile enviroment for a few hours;however, if there is fertile cervical fluid present then sperm can live approx 72 hours. 

So how can you tell?  wait a few weeks and if your period is late then take an HPT. 

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