Get this evaluated: Getting your period only every six months can be a sign of some hormonal imbalance. There are several treatable medical conditions that can cause infrequent periods (oligomenorrhea), including polycystic ovarian syndrome, hypothyroidism, and hyperprolactinemia. Eating disorders and excessive exercising can also cause this problem. This can be a normal side effect of some hormonal birth control.
Answered 3/31/2014
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