Primary amenorrhoea (menstrual periods fail to appear
at puberty) may be caused by absence of the uterus or ovaries (e.g.
Turner’s
syndrome) or a hormonal imbalance.
Secondary amenorrhoea (menstrual periods stop after establishment
of puberty) may be caused by disorders of the hypothalamus, deficiency
of ovarian, pituitary, or thyroid hormones, mental disturbance, depression,
anorexia nervosa, or a major change of surroundings or circumstances.
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