Effects of inhibin on DHP-induced oocyte maturation. Various doses of inhibin, as indicated on the abscissa, were added to the culture media together with three doses of DHP (0.001, 0.01, and 0.1) μg/ml. Oocyte maturation was monitored by scoring GVBD at 16 (A), 24 (B) and 40 hr (C) of incubation. Data are the mean ± SEM from 3–4 different experiments. Same letter indicates significantly different from each other at P ≤ 0.05.