Crowther M E, Grudzinskas J G, Poulton T A, Gordon Y B
Obstet Gynecol. 1979 Jan;53(1):59-61.
Trophoblast-"specific" proteins in the plasma of 37 patients with primary epithelial carcinoma of the ovary were measured. Circulating pregnancy-specific beta1-glycoprotein (SP1) was detected in 5 subjects, human chorionic gonadotrophin (hCG) was found in 2 subjects, and human placental lactogen (hPL) was detected in 8 subjects.