44.下列何種激素最適合用於協助孕婦維持懷孕?(A)催產素(oxytocin)(B)睪固酮(testosterone)(C)泌乳激素(prolactin)(D)促爐泡激素(follicle stimulating hormone)(E)人類賊毛膜促性腺激素(human chorionic gonadotropin)