Having only one follicle in a natural cycle of IVF does not necessarily mean that it will fail. If the natural cycle fails, the treatment can be continued under the supervision of the doctor. Natural cycle IVF means that no ovulation stimulation medication is required. This is due to the fact that some patients have a relatively good ovarian reserve and do not need to undergo the ovulation stimulation step, and can complete the whole process of IVF with only one naturally discharged egg. The natural cycle takes the matured egg that a woman releases each menstrual cycle, and the embryo formed from it has the best potential for development. Therefore, natural cycles perform natural embryo selection as opposed to medicated ovulation cycles. Natural cycles can also be continued in the next month if they fail, subject to a comprehensive judgment after a detailed examination by a doctor. Therefore, women who are interested in undergoing IVF need to choose the method of egg retrieval under the advice of their doctors.