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Irregular Periods in Girls (Amenorrhea)

Key points about amenorrhea

  • Amenorrhea is when a girl’s menstrual bleeding (period) doesn’t occur.
  • Primary amenorrhea is when the first menstrual bleeding at puberty doesn’t occur by age 15. Secondary amenorrhea is when normal menstrual bleeding stops occurring for 3 months or more.
  • Amenorrhea has many causes, including hormone problems, eating habits and exercise, or a birth defect.
  • Your child may need blood tests and a pelvic ultrasound.
  • Treatment may be done with hormones or other medicines, changes in diet or exercise, and calcium supplements.
  • A girl with amenorrhea may have thinning bones (osteoporosis) over time, and loss of fertility.
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