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A 25-year-old male asked:

My girlfriend has her period on every 21 days.it's regular. she is 27 with hyperthyroidism&low bone density.is it normal.what maybe the complications?

1 doctor answer3 doctors weighed in
Dr. Rachel Johns
Specializes in Internal Medicine
Normal for her: Each woman has a different menustral cycle and pattern. Some women have short cycles, like 21 cycles. Others have long cycles - 35 cycles. Some women are regular like clockwork. Others are variable every month. Your girlfriend's cycles sound like they are normal for her. There are no complications.

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Last updated Apr 10, 2015

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