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1.
September 2017

Members Only


2.
December 2016

Practice Bulletin Number 175, December 2016

(Replaces Practice Bulletin Number 101, February 2009,
and Committee Opinion 297, August 2004)
(Reaffirmed 2018)

Members Only


Practice Bulletin Number 163, May 2016

(Replaces Practice Bulletin Number 77, January 2007)
(See also Practice Bulletin Number 162, Prenatal Diagnostic Testing for Genetic Disorders) (Reaffirmed 2018)

Members Only


Committee Opinion Number 278, November 2002

Reaffirmed 2019

ABSTRACT: Clinically significant false-positive human chorionic gonadotropin (hCG) test results are rare. However, some individuals have circulating factors in their serum (eg, heterophilic antibodies or nonactive forms of hCG) that interact with the hCG antibody and cause unusual or unexpected test results. False-positive and false-negative test results can occur with any specimen, and caution should be exercised when clinical findings and laboratory results are discordant. Methods to rule out the presence of interfering substances include using a urine test, rerunning the assay with serial ...


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American College of Obstetricians and Gynecologists
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