A member asked:

How much time will my birth control have lowered effectiveness?

A doctor has provided 1 answer

Please Clarify: Please give us more information. Birth control pills are very effective if taken accurately and precisely. Emergency birth control pills should be taken within 72 hours of unprotected sex. When taken after 72 hours they are much less effective. The sooner you take it the more effective it is. IUDs have longer effective time period. I hope I have answered your question.

Answered 9/28/2016

3.9k views

Thank

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