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Bleeding during and after sex
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An_249463 posted:
Im currently 17 and am on birth control, shouldnt start my period for another week at least
i had sex for the first time 2 weeks ago and the third time today but stopped from pain and bleeding. The bleeding is as heavy as my period and is still going on and worrying me. please help!
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Jane Harrison Hohner, RN, RNP responded:
Dear An: Breakthrough bleeding (BTB) can be a common side effect of most types of hormonal birth control (eg pills/patch/ring/shot/Mirena IUD). Among birth control pill users BTB frequently occurs after a missed or late pill. In your case it sounds like you are careful to take pills at the same time daily. More remotely, BTB in a pill user can arise if she has gotten a chlamydia infection. Yet, if you both are monogamous this is not going to apply.

When a woman uses hormonal birth control it can make the lining of the uterus more unstable--so it is easier to have some of it begin to shed. Sometimes the lining is less stable because the hormones make the lining much thinner (actually this is good as a thin lining is a healthy lining). Sometimes the lining is unstable because the hormones can make parts of the lining out of synch. This is more common during the initial months of Pill use.

So why would this happen just during sex? During heavy exercise (and intercourse) it can be easier for BTB to occur as it is easier for an out of sync lining to begin to shed.

Bottom line, BTB on hormonal methods of birth control is a nuisance side effect. The protection from pregnancy is still in effect. If your poor cycle control and/or pain persists you should call your GYN or clinic. Often a change in the brand, or formula, of birth control pill will fix the problem. They can also check you for chlamydia if needed.

Yours,
Jane


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