Gonadotropins include two kinds of drugs, one is chorionic gonadotropin injection and the other is urinary gonadotropin injection. These two drugs can promote gonadal development, and their use requires a clear diagnosis of the presence of sex hormone deficiency, and their use under the guidance of a doctor after diagnosis.1. Chorionic gonadotropin injection: It is generally more helpful for improving secondary sexual characteristics. In men, intramuscular injection can promote the production of testosterone, making it more masculine. Female use can promote the production of estrogen, maintain the function of the corpus luteum, make the corpus luteum synthesize progesterone, and can promote the appearance of female secondary sexual characteristics; 2. Urotrophin injection: after use can promote the development of male or female sex organs, promote male testicular development, and promote sperm maturation. After use in women, it can promote the development of uterus and ovaries and the production of egg follicles. Patients who require gonadotropin are generally gonadotropin deficient, often seen in hypothalamic, or hypopituitary patients, the application method is intramuscular injection, the specific dose should be based on the patient’s weight, and the response to the drug.