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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Is Pregnancy Possible While On Birth Control Pills?

I m on birth control and my boyfriend and I have mostly protected sex but if we don t he pulls out before he comes. Is there still a possibility that I could be pregnant.... I also gained 15 pounds in threw months.
Mon, 30 Apr 2018
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General & Family Physician 's  Response
Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.

Short answer: Pregnancy highly unlikely.

Detailed answer: When birth control methods are used appropriately, i.e. when they are used according to producers guidelines, then a pregnancy is almost unlikely (99.9% unlikely) even though you have unprotected sex.

Therefore, assuming that you have followed rigorously the guidelines for birth control usage, and taking into consideration that most of the time you and your boyfriend have protected sex and when not, he pulls out before he comes, I would reasonably think that you are not pregnant.

The issue of weight gain is not an indication of pregnancy in your case, since in some case the use of birth control pills could cause a mild weight gain due to increased fluid retention and/or change in appetite, even though today modern birth control methods use very low levels of hormones.

In case you are using an estrogen based birth control method, then it is very likely that your weight gain is due to increased water retention and not fat.

If your birth control method is based on progestin than your weight gain is likely to be due to extra fat stored.

In case you are concerned about your weight gain then you have to talk to your gynecologist and decide about the option to change the birth control method in order to have a lesser impact on your weight.

Hope I have answered your query. Let me know if I can assist you further.

Regards,
Dr. Ervin Toçi
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Is Pregnancy Possible While On Birth Control Pills?

Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Short answer: Pregnancy highly unlikely. Detailed answer: When birth control methods are used appropriately, i.e. when they are used according to producers guidelines, then a pregnancy is almost unlikely (99.9% unlikely) even though you have unprotected sex. Therefore, assuming that you have followed rigorously the guidelines for birth control usage, and taking into consideration that most of the time you and your boyfriend have protected sex and when not, he pulls out before he comes, I would reasonably think that you are not pregnant. The issue of weight gain is not an indication of pregnancy in your case, since in some case the use of birth control pills could cause a mild weight gain due to increased fluid retention and/or change in appetite, even though today modern birth control methods use very low levels of hormones. In case you are using an estrogen based birth control method, then it is very likely that your weight gain is due to increased water retention and not fat. If your birth control method is based on progestin than your weight gain is likely to be due to extra fat stored. In case you are concerned about your weight gain then you have to talk to your gynecologist and decide about the option to change the birth control method in order to have a lesser impact on your weight. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ervin Toçi