Amenorrhea is the absence of menstrual periods in a woman of reproductive age. It can be classified into two types: primary amenorrhea, where a girl has not started menstruating by the age of sixteen, and secondary amenorrhea, where a woman who previously had regular periods stops menstruating for three or more months. Causes of amenorrhea can include hormonal imbalances, stress, significant weight loss or gain, excessive exercise, and certain medical conditions such as polycystic ovary syndrome (PCOS) or thyroid disorders. Treatment for amenorrhea depends on the underlying cause and may involve lifestyle changes, hormone therapy, or medications.

英語での「amenorrhoea」の定義と意味

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