Don’t obtain a karyotype as part of the initial evaluation for amenorrhea.
|Rationale and Comments:||Amenorrhea is the absence of menstruation and can be attributed to many causes. A karyotype (chromosomal analysis) is not indicated as an initial test for amenorrhea as it is not a screening test. However, it is indicated to further evaluate the etiology of an elevated follicle-stimulating hormone in a woman under 40 years of age or in the presence of physical findings suggestive of disorders of sexual development.|
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• Bachmann GA, Kemmann E. Prevalence of oligomenorrhea and amenorrhea in a college population. Am J Obstet Gynecol. 1982 Sep 1;144(1):98–102.
• Reindollar RH, Byrd JR, McDonough PG. Delayed sexual development: a study of 252 patients. Am J Obstet Gynecol. 1981 Jun 15;140(4):371–80.
• Reindollar RH, Novak M, Tho SP, McDonough PG. Adult-onset amenorrhea: a study of 262 patients. Am J Obstet Gynecol. 1986 Sep;155(3):531–43.
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