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Had Unprotected Sex Before Periods. On Birth Control Pills. What Are The Chances Of Pregnancy?

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Posted on Sun, 4 Aug 2013
Question: My period ladted only 2 1/2 days when it`s normally 4-5. I am on birth control and havebeen for a few years. My boyfriend and I Ihad unprotected sex before my period. What are my chances of being pregnant?
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Answered by Dr. Dr. Prasad J (13 minutes later)
Hi,

I hope you are on regular combined birth control pills. Combined oral pills are more than 99% effective in preventing unwanted pregnancies when they are taken religiously. The effectiveness is slightly altered when you miss more than one pill.

Since you have been on pills for years, I presume you take them without missing pills. In such a case, I don't think you have any chance of being pregnant.

Let me know if my presumption is not right. We shall discuss further.

Best Regards

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Dr. Prasad J

General & Family Physician

Practicing since :2005

Answered : 3708 Questions

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Had Unprotected Sex Before Periods. On Birth Control Pills. What Are The Chances Of Pregnancy?

Hi,

I hope you are on regular combined birth control pills. Combined oral pills are more than 99% effective in preventing unwanted pregnancies when they are taken religiously. The effectiveness is slightly altered when you miss more than one pill.

Since you have been on pills for years, I presume you take them without missing pills. In such a case, I don't think you have any chance of being pregnant.

Let me know if my presumption is not right. We shall discuss further.

Best Regards