Only 400 to 500 follicles typically develop and ovulate during a woman’s lifetime, which is only about 0.1% of the total. With IVF, these atretic follicles are allowed to grow and be fully utilized. The earliest IVF was performed using a natural cycle where one egg was retrieved, fertilized in vitro and then implanted. The success rate was very low because a single embryo was implanted; in the late 1970s, ovulation-promoting drugs were used to promote ovulation and the number of eggs obtained increased before the success rate of IVF treatment followed. The lower the ovulation rate, the lower the success rate? Many scholars believe that the higher the number of eggs retrieved, the higher the success rate, while patients with low ovulation rates have a much lower success rate. Is this really the case? A number of studies have been conducted to compare and analyze whether the higher the number of eggs retrieved, the higher the success rate, or if there is a limit, or even if there is an optimal number of eggs retrieved to expect a high IVF treatment success rate. Here’s the truth! The results of the study found that: 1) Patients under the age of 30, with 20 eggs retrieved, 5 fertilized and 2 quality embryos transferred, had a higher pregnancy rate for IVF treatment. For patients between the ages of thirty and thirty-seven, the higher the number of fertilized embryos, the higher the success rate, and when the number of fertilized embryos reaches five, the success rate does not increase when it exceeds five. 3. When the patient is over thirty-seven years old, the success rate increases with each additional two fertilized eggs. However, when the number of eggs retrieved exceeds twenty, the risk of ovarian hyperstimulation is greatly increased and affects embryo transfer, which does not improve the success rate of IVF and increases the cost of treatment.