Taking Letrozole follicles too much, usually caused by taking drugs, this time need to accept ultrasound examination to monitor the development of follicles, in order to prepare for pregnancy to make full preparations. Letrozole is a kind of drug with the effect of promoting ovulation, follicle development is small, you can take letrozole to promote follicle growth, this may cause too many follicles, it is recommended to go to the regular hospital to receive ultrasound examination, in order to monitor the development of follicles. If the follicles are underdeveloped, injection of human chorionic gonadotropin is recommended to promote follicular development. If after maturation, ovulation does not occur, injection of human chorionic gonadotropin can also be used to promote ovulation, and then coitus can be directed to increase the probability of pregnancy. Adverse effects of Letrozole include hot flashes, alopecia, and vaginal bleeding, etc. The application of the drug carries a certain degree of risk, and it needs to be applied under the guidance of a specialized doctor, not blindly used on its own.