Amenorrhea

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Amenorrhea is the absence, discontinuation or abnormal stoppage of the menstrual periods in the reproductive female (1). Amenorrhea can be either primary or secondary.

Primary amenorrhea is defined as either:

  1. no period by age 14 in the absence of growth and development of secondary sexual characteristics; or
  2. no period by age 16 regardless of the presence of normal growth and development of secondary sexual characteristics.

Secondary amenorrhea is the lack of period for at least 6 months at any time after menarche. This can be the result of pregnancy, brain tumours, malnutrition or the like.