Essential Endocrinology and Diabetes Endocrinology at a Glance (At a Glance S.)
Essential Endocrinology and Diabetes Endocrinology at a Glance (At a Glance S.)


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 by 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 by a major change of surroundings or circumstances.

Effect (Symptoms)

The absence or stopping of the menstrual periods.
(It is normal for the periods to be absent before puberty, during pregnancy and milk secretion, and after the end of the reproductive period.)


See also endocrine conditions and disorders (all on one page).

Further information about the endocrine system includes the introduction to the endocrine system and an explanation of what endocrinology means and includes.

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