Chlortetracycline can be used in the treatment or diagnosis of cryptorchidism in adolescence, pituitary gonadotropin deficiency leading to infertility and anovulation. The combination of this drug, or the combination of postmenopausal gonadotropins can promote ovulation when the application of clomiphene treatment is not effective. It can be used for functional uterine bleeding, habitual miscarriage, female luteal insufficiency, and pre-term miscarriage. It is best to follow the doctor’s prescription, otherwise it can lead to adverse reactions, such as inducing moderate ovarian enlargement or ovarian cysts during ovulation promotion; for the treatment of cryptorchidism, precocious male puberty, testicular enlargement, excessive weight growth, acne, etc. The specific treatment should be tailored to the individual situation, do not blindly use drugs.