It is normal for the basal eggs to become fewer after IVF down-regulation and there is no need to worry. It is normal to observe a decrease in the number of follicles after a woman has undergone down-regulation therapy, and continued observation is recommended. The so-called lowering, that is to say, lowering the pituitary regulation function, at the same time suppressing the luteinizing hormone and the overall follicular phase of the hormone level, can promote the normal development of follicles. Clinically, if a patient suffers from polycystic ovary syndrome (PCOS), the development and maturation of the follicles will be adversely affected, and he/she needs to undergo down-regulation treatment in order to promote synchronized follicular development, which will help to obtain more mature follicles when undergoing IVF implantation in the future. IVF transplantation is a relatively complicated treatment, and it is recommended that women need to actively cooperate with their specialists to do all kinds of nursing work.