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Pituitary hCG

The anterior stalk of the pituitary secretes luteinizing hormone (LH), which shares an alpha subunit with hCG. In normal menstrual cycles, pituitary generated hCG may be detectable at the time of the LH surge. Estrogen provides negative feedback for this LH secretion and acts as a suppressing agent. In patients in low-estrogen states (perimenopause, menopause, and status postoophorectomy), pituitary hCG may be secreted in increasing amounts, although only levels between 1 to 32 mIU/mL have been recorded.[1] To confirm a pituitary source for the hCG, patients are started on high-dose oral contraceptive pills to produce an exogenous source of estrogen. In general, patients with pituitary hCG will have their hCG levels suppressed after 3 weeks on this regimen.[1]


  1. Muller CY, Cole LA: The quagmire of hCG and hCG testing in gynecologic oncology. Gynecol Oncol 112 (3): 663-72, 2009.

This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

WebMD Public Information from the National Cancer Institute

Last Updated: May 28, 2015
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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