Transplantation of artificial cycles refers to the use of drugs to promote the growth of follicles and endometrium, while natural cycles refer to the natural development of follicles to secrete hormones to promote the growth of endometrium in a natural state. Natural cycles are those that rely on the natural development of the follicles to produce hormones to promote the growth of the lining of the uterus. Natural cycle refers to the natural state of relying on the estrogen secreted by the follicles to promote the growth of the endometrial lining. With the growth of the follicles, the thickness of the endometrial lining will gradually increase, and when the thickness of the endometrial lining reaches the criteria for transfer, the embryo can be arranged to be transferred. Compared to women who are transferring artificial cycles, this situation can reduce the dose of drugs used by women and is suitable for infertile women with tubal lesions.