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81.
August 2009

Practice Bulletin Number 107, August 2009

Replaces Practice Bulletin Number 10, November 1999; Committee Opinion Number 228, November 1999; Committee Opinion Number 248, December 2000; Committee Opinion Number 283, May 2003 (Reaffirmed 2019)

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Practice Bulletin Number 106, July 2009

Replaces Practice Bulletin Number 70, December 2005. Reaffirmed 2019

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Practice Bulletin Number 105, June 2009

Reaffirmed 2019

Members Only


84.
March 2009

Practice Bulletin Number 102, March 2009

(Replaces Committee Opinion Number 383, October 2007) (Reaffirmed 2019)

Members Only


85.
July 2008

Practice Bulletin Number 95, July 2008

Reaffirmed 2019

Members Only


Practice Bulletin Number 92, April 2008

(Replaces Practice Bulletin Number 87, November 2007) (Reaffirmed 2019)

Members Only


87.
February 2008

Practice Bulletin Number 90, February 2008

(Reaffirmed 2019)

Members Only


88.
October 2007

Practice Bulletin Number 86, October 2007

(Replaces Educational Bulletin Number 248, July 1998) (Reaffirmed 2018)

Members Only


Practice Bulletin Number 82, June 2007

(Replaces Practice Bulletin Number 8, October 1999) (Reaffirmed 2019)

Members Only


Practice Bulletin Number 78, January 2007

(Replaces Practice Bulletin Number 64, July 2005) (Reaffirmed 2019)

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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