As the saying goes, it is better to teach people to fish than to teach people to fish, before the main topic to learn to “fish”. Raise fish to first have fish fry, day by day carefully fed, the fish grow up after a net to spread down, catch the fish are fat and fresh, so that we cooked a plate of color and flavor of braised fish. So if we initially have fewer fry, the fishing difficulty increases, then the braised fish still eat it or not? Egg rearing is like fish rearing, compare basic follicle to fish fry, ovulation medicine to fish food, egg harvesting is like fishing, fish fry more fish food to harvest more. The number of eggs obtained is based on the number of basal follicles and the response to the medication. For fresh embryo transfer, an appropriate number of eggs (9-15) is needed to obtain the best pregnancy rate and to avoid the effects of supraphysiological estrogen and progesterone action on the endometrium. With the development of freezing technology, frozen embryo transfer is widely accepted. Often patients want to harvest more eggs and “one egg retrieval is enough”. After the fresh embryo transfer, the surplus frozen embryos can be transferred into the uterus after future recovery. Studies have shown that within safety limits, the higher the number of eggs, the higher the chance of transferring D3 embryos or blastocysts, and the higher the chance of obtaining a total pregnancy in a single egg retrieval cycle, while the miscarriage rate does not increase with the number of eggs, and the rate of two live births (one transfer with a live birth followed by a second transfer with a live birth) increases. Therefore, the “one egg retrieval is enough” approach is the least stressful and is a common goal for both the doctor and the patient. Studies have shown that with more than 4 eggs, the live birth rate after fresh embryo transfer is already significant and I believe that most people can achieve this level. When the number of eggs obtained is very low (1-3), the live birth rate after fresh embryo transfer is significantly lower and the results are not satisfactory. When the number of eggs obtained is 10 or more, it is a more satisfactory situation to have a whole fish dinner. At lower numbers (4-9), the pregnancy outcome is still not too bad. If the number of eggs obtained is very low (1-3), it is common in women of advanced age or in women with premature ovarian failure, perhaps due to age-related ovarian aging, perhaps due to pathological and genetic factors that affect egg quality and embryonic development potential, and if combined with factors such as endometrial damage, the outcome of the assisted conception is poor and stressful. At this time, poor ovarian function, poor ovarian response to endogenous and exogenous hormones, decreased egg acquisition, decreased egg quality, decreased pregnancy rates, and increased average treatment costs. Thus, the extreme reduction in follicle numbers has an all-encompassing effect on treatment. Just as we have few and unhealthy fry, even fewer fish grow up, some looking sickly, making the dream of a fish feast as a mirror in the water. However, a plate of braised fish only needs one fatty fish, and pregnancy only needs one giving embryo. With so few eggs, it is no longer wise to raise blastocysts or biopsy embryos, and it is difficult to determine the developmental potential of a transferable embryo. With low egg production, if good embryos can be formed, there is a chance of transfer and a possible pregnancy and delivery. Some patients with few eggs and few but fine embryos may be lucky enough to have a successful pregnancy when the endometrium is well tolerated. The pregnancy rate is more optimistic especially for young patients younger than 35 years with poor response. There are quite a few embryos that may suffer repeated transfer failures if they are of poor quality, combined with poor endometrial tolerance. While the number of eggs is important, the quality of the eggs seems to be more important. How to improve the quality of each egg is becoming one of the most important topics in the field of reproduction day by day. Patients with few follicles require a finely individualized ovulation promotion protocol that requires the help of endogenous hormones and not all exogenous hormone overuse. Some studies have shown that a staged treatment protocol, i.e. embryo saving followed by frozen embryo transfer, can improve cumulative pregnancy rates. The “three months of egg production”, improved nutrition (vitamin D, folic acid, protein), weight management, long course of growth hormone therapy, complementary medicines such as (coenzyme Q10, DHEA, L-carnitine, etc.), and acupuncture and physical therapy in Chinese medicine all provide varying degrees of improvement. It is worth reminding that age is still the most critical factor in egg quality, and one should not blindly believe in assisted reproductive science and technology while ignoring the importance of age-appropriate fertility for one’s health, family and society. Finally, regardless of the number of follicles, assisted conception requires good mindfulness, overcoming anxiety, rationalizing expectations, and proceeding with a peaceful attitude to achieve a good pregnancy outcome.