Differences in Serum Human Chorionic Gonadotropin Rise in Early Pregnancy by Race and Value at Presentation.
Barnhart KT, Guo W, Cary MS, Morse CB, Chung K, Takacs P, Senapati S, Sammel MD. Differences in Serum Human Chorionic Gonadotropin Rise in Early Pregnancy by Race and Value at Presentation. Obstet Gynecol. 2016 09; 128(3):504-511.