About Controlled Ovarian Hyperstimulation, which of the following is wrong （）

A.GnRH agonist is used to increase the number of follicles.

B.Natural cycle has only one mature egg so that the success rate is low.

C.The ovulation time is not fixed. It is not easy to obtain eggs.

D.Individualized Controlled Ovarian Hyperstimulation include long protocol, short protocol, antagonist protocol, mild-stimulation protocol, etc.

正确答案：GnRH agonist is used to increase the number of follicles.