Defining the curve when initial levels of human chorionic gonadotropin in patients with spontaneous abortions are low.
Chung K, Sammel M, Zhou L, Hummel A, Guo W, Barnhart K. Defining the curve when initial levels of human chorionic gonadotropin in patients with spontaneous abortions are low. Fertil Steril. 2006 Feb; 85(2):508-10.