First demonstration of induction of ovulation with a hybrid human chorionic gonadotropin compound (AB1ER-CR-2XY).

This study presents the first demonstration of the ability of a hybrid human chorionic gonadotropin (hCG) compound, AB1ER-CR-2XY, to induce ovulation in humans. Thirteen patients with primary infertility were treated for 16 cycles with varying dosages of human menopausal gonadotropin (hMG), and 10,000, 5000, and 2500 IU of the hybrid hCG. Presumptive occurrence of ovulation was recorded in 15 courses of medication. Echographic studies did not indicate overt follicular or ovarian enlargement. Two singleton pregnancies occurred, one during the first treatment course and the other following the second course of hMG/hybrid hCG therapy. Due to its specific characteristics, the hybrid hCG may provide equal or greater effectiveness and a better margin of safety than commercial hCG used for ovulation induction in patients pretreated with hMG.