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How does birth control work? a serious question

I am an adult so I do not need any childish answer.

First period began Wednesday November 19 I took my first set of birth control pill on Monday november 24 I been taking it I had unprotected sex on Sunday November 30 is there a chance I could be pregnant bc it hasn't been exactly 7 days I know very stupid of me but please i need serious answers.

How does birth control work 5 days after your first period you are protected if you take pill 5 days after you're first period if that is correct then my timing I wouldn't be pregnant bc I did take the pill 5 days after my period I startedon a Monday.
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replied December 1st, 2014
Welcome to the ehealthforum and I am glad to help you out.

Ideally you should start the pills on the first day of menstrual cycle. Since you started on the 5th day and did not have intercourse for the first 6 days, chances of pregnancy are very unlikely.

Take your birth control pills regularly without fail. you are apprehensive regarding the status of your pregnancy you can get it checked. Most home pregnancy tests that check urine beta-HCG are sensitive to 20-25 mIU/ml of HCG. The test can be positive anywhere from about 2-3 days prior to a missed menses to 4-5 days after, but usually it should be done 7-10 days past your missed period.

Otherwise you can get a serum HCG also done which is more specific than urine pregnancy test.

I sincerely hope that helps. Take care.
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