Premature ovarian failure, rapid weight loss, extreme physical exertion, low body mass index (BMI) as in anorexia nervosa, and pregnancy will cause abnormal menstrual cycles ( Table 2 ). Discontinuation of oral contraceptives may also cause amenorrhea. The latter is called post-pill amenorrhea. A pituitary adenoma, hyperthyroidism, or hypothyroidism will also cause a change in the menstrual cycle.
Other important etiologies to consider include congenital adrenal hyperplasia, late-onset adrenal hyperplasia, and Cushing's syndrome. Tumors of the adrenal gland or the ovaries may also present with menstrual irregularities.[8,9,16]
Topics in Advanced Practice Nursing eJournal. 2002;2(3) © 2002 Medscape
Cite this: Polycystic Ovary Syndrome: An Overview - Medscape - Jul 31, 2002.