The role of chorionic gonadotropin injections is quite diverse, and the most common roles are as follows: 1. Women with endocrine disorders or polycystic ovary syndrome may have immature follicles, so it is not easy to get pregnant. The most common use of chorionic gonadotropin injections is for fetal preservation treatment, for example, when a woman is pregnant and has a low secretion of chorionic gonadotropin, which can affect the development of the embryo and lead to miscarriage.