Current Evaluation of Amenorrhea and Oligomenorrhoea

The evaluation of amenorrhea (absence of menstruation) and oligomenorrhea (infrequent menstruation) involves a thorough assessment of a woman's medical history, physical examination, and targeted laboratory tests. The evaluation aims to identify potential underlying causes, such as hormonal...

• Amenorrhea is defined as the absence of menstruation, categorized as primary (no menstruation by age 15) or secondary (absence for 3-6 months with prior regular cycles). Oligomenorrhea is infrequent menstruation (less than nine cycles per year). Menstruation is regulated by the hypothalamic-pituitary-ovarian axis, involving gonadotropin-releasing hormone, FSH, LH, estrogen, and progesterone.