Medications that promote follicular development include Letrozole, Clomiphene, Gonafen, Hermitage, and Loreal. In general, infertility is only considered when a patient has not conceived after one year of trying to conceive. For women with infertility, there are many causes, including ovulation problems or problems with the fallopian tubes and the endometrium of the uterus. The application of ovulation-promoting drugs is generally suitable for infertility caused by ovulation disorders, in which case ovulation-promoting drugs, such as letrozole and clomiphene, can be chosen. If the patient has incompetent fallopian tubes or bilateral tubal obstruction, follicle-promoting drugs can also be used in this case, such as Fenafen, Hermitage, Loreal, etc.