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Absent menstrual periods - secondary

  • Definition
    • Absence of a woman's monthly menstrual period is called amenorrhea. Secondary amenorrhea is when a woman who has been having normal menstrual cycles stops getting her periods for 6 months or longer.

  • Alternative Names
    • Amenorrhea - secondary; No periods - secondary; Absent periods - secondary; Absent menses - secondary; Absence of periods - secondary

  • Causes
    • Secondary amenorrhea can occur due to natural changes in the body. For example, the most common cause of secondary amenorrhea is pregnancy. Breastfeeding and menopause are also common, but natural, causes.

      Women who take birth control pills or who receive hormone shots such as Depo-Provera may not have any monthly bleeding. When they stop taking these hormones, their periods may not return for more than 6 months.

      You are more likely to have absent periods if you:

      • Are obese
      • Exercise too much and for long periods of time
      • Have very low body fat (less than 15 to 17%)
      • Have severe anxiety or emotional distress
      • Lose a lot of weight suddenly (for example, from strict or extreme diets or after gastric bypass surgery)

      Other causes include:

      Also, procedures such as a dilation and curettage (D and C) can cause scar tissue to form. This tissue may cause a woman to stop menstruating. This is called Asherman syndrome. Scarring may also be caused by some severe pelvic infections.

  • Symptoms
    • In addition to having no menstrual periods, other symptoms can include:

      • Breast size changes
      • Weight gain or weight loss
      • Discharge from the breast or change in breast size
      • Acne and increased hair growth in a male pattern
      • Vaginal dryness
      • Voice changes

      If amenorrhea is caused by a pituitary tumor, there may be other symptoms related to the tumor, such as vision loss and headache.

  • Exams and Tests
  • Treatment
    • Treatment depends on the cause of amenorrhea. Normal monthly periods most often return after the condition is treated.

      A lack of menstrual period due to obesity, vigorous exercise, or weight loss may respond to a change in exercise routine or weight control (gain or loss, as needed).

  • Outlook (Prognosis)
    • The outlook depends on the cause of amenorrhea. Many of the conditions that cause secondary amenorrhea will respond to treatment.

  • When to Contact a Medical Professional
    • See your primary health care provider or women's health care provider if you have missed more than one period so that you can get diagnosed and treated, if needed.

  • References
    • Bulun SE. Physiology and pathology of the female reproductive axis. In: Melmed S, Polonsky KS, Crane RT, Larsen PR, Kronenberg HM, eds. Williams Textbook of Endocrinology. 13th ed. Philadelphia, PA: Elsevier; 2016:chap 17.

      Ferri FF. Amenorrhea. In: Ferri FF, ed. Ferri's Clinical Advisor 2016. Philadelphia, PA: Elsevier; 2016:100-103.e2.

      Lobo RA. Primary and secondary amenorrhea and precocious puberty: etiology, diagnostic evaluation, management. In: Lentz GM, Lobo RA, Gershenson DM, Katz VL, eds. Comprehensive Gynecology. 6th ed. Philadelphia, PA: Elsevier Mosby; 2012:chap 38.