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Pill and Period Cycle
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haveaquestion posted:
I have been taking the pill regularly to miss my period for the past 3 years (Lo Estrin) and am 40 years old. Last week experienced breakthrough bleeding for a day plus cramping (during the non-sugar pill week). Today got PMS-like headache and now some light bleeding, also during the non-sugar pill week. Is this abnormal?
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Jane Harrison Hohner, RN, RNP responded:
Dear haveaquestion: If you have been using active LoEstrin pills continuously (or perhaps taking placebo week every three months) for three years it is amazing that this is your first episode of breakthrough bleeding (BTB) and accompanied cramping. Alas, BTB can be very common on continuous regimens. If there have been no late or skipped pills, nor any chance for a new chlamydia infection then the usual reason relates to the effect of the hormones on the uterine lining.

As you may have read, 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). This is a common culprit among longer term users such as your self. Sometimes the lining is unstable because the hormones can make parts of the lining out of synch. While this is the more common reason among new users, occasionally it can arise in continuous use regimens. If a GYN suspects this reason they may have the women take a short break from the active pills. When the hormone blood levels drop, that will initiate an orderly withdrawal bleed. When the entire lining sheds together it can "fix" the erratic BTB.

In terms of the cramping, that can be linked to the BTB. Prostaglandins (substance that prompts uterine contractions/cramps) are released prior to the onset of bleeding.

If your BTB persists or worsens you should contact your GYN or clinic for an evaluation. They MIGHT have you do a withdrawal bleed, or may have another suggestion (eg dose or brand change).

Yours,
Jane
 
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haveaquestion replied to Jane Harrison Hohner, RN, RNP's response:
Thank you!!


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