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Can i become pregnant from missing 2 birth control pills and have unprotected sex on the 2 day that i missed?

By Anonymous April 19, 2012 - 12:52pm
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I am in the 2nd week of my birth control and i miss 2 of the pills, (tuesday and wednesday) i had unprotected sex on wednesday.. could i become pregnant? And what percentile would it be?

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Hello Anonymous,
To answer your question, let me explain to you how birth control pills work. Birth control pills prevent pregnancy mainly by stopping ovulation. If no egg is released, there is nothing to be fertilized by sperm. Thus, a woman cannot get pregnant.

You missed 2 doses of your birth control pill during your second week. On average, ovulation occurs anywhere between day 11 and day 21 of an average monthly menstrual cycle of between 28 to 32 days.

I am concerned that you missed 2 doses at a critical time in your cycle. In a combination birth control pill, synthetic estrogen stops the pituitary gland from producing the hormones FSH and LH,thus preventing ovulation. Synthetic progestin, in the birth control pill, also stops the pituitary gland from producing LH and prevents ovulation, while causing changes in the uterine lining, thickening the cervical mucus and partially limiting the sperm's ability to fertilize the egg.

Missing 2 doses and having unprotected sex on the second day does put you at a slight risk for conceiving. The risk increases when you miss a week of active birth control pills.

You have a 50/50 chance of being pregnant or not being pregnant.


April 19, 2012 - 4:36pm
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