Amenorrhoea

Amenorrhoea is absence of menstruation. Amenorrhoea is abnormal except before puberty, during pregnancy, during early lactation, and after menopause. Amenorrhea is traditionally categorized as primary (menarche has not occurred by age 16) or secondary (menses has not occurred for ≥ 3 mo in women who have had menses)

Causes of primary Amenorrhoea

Failure of the ovaries (female sex organs that hold eggs). Problems in the central nervous system (brain and spinal cord) or the pituitary gland (a gland in the brain that makes hormones involved in menstruation). Poorly formed reproductive organs.

Causes of secondary Amenorrhoea

Pregnancy, Breast feeding, Stopping the use of birth control, Menopause, Some birth control methods, such as Depo-Provera, Stress , Poor nutrition, Depression, Certain drugs, Extreme weight loss, Over-exercising, Ongoing illness, Sudden weight gain or being very overweight (obesity), Hormonal imbalance due to polycystic ovarian syndrome (PCOS), Thyroid gland disorders, Tumors on the ovaries or brain (rare), A woman who has had her uterus or ovaries removed will also stop menstruating