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Obstet Gynecol. 1986 Sep;68(3):390-4. doi: 10.1097/00006250-198609000-00021.

Serum progesterone levels as an aid in the diagnosis of ectopic pregnancy.

Obstetrics and gynecology

C P Matthews, P B Coulson, R A Wild

PMID: 3737064 DOI: 10.1097/00006250-198609000-00021

Abstract

Progesterone levels in 29 women with ectopic pregnancies and 20 women with early intrauterine pregnancies were evaluated using a new direct radioimmunoassay that offers results within four hours. Patients with normal intrauterine pregnancies had serum progesterone levels greater than 20 ng/mL (mean = 30.9 ng/mL) while all patients with ectopic pregnancies had progesterone levels less than 15 ng/mL (mean = 5.7 ng/mL). The incorporation of the progesterone assay into the workup of a patient with suspected ectopic pregnancy can be a useful clinical adjunct to the conventional methods of evaluation.

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