The best value of E2 before egg retrieval is 700-2200 pmol/L, E2 is estrogen, which is an endocrine hormone produced by the body, through the value of E2 you can judge the function of the ovaries, it is best to carry out ultrasound to check the development of follicles, if there is a normal follicle, you can go to the hospital to retrieve the eggs, you need to take an injection of HCG before retrieving the eggs, and you can retrieve the eggs the next day after injecting the drug. The next day after the injection, the eggs can be retrieved. When retrieving eggs, you need to pay attention to the vulva hygiene, it is best to use lukewarm water to rinse the vagina, not coitus. There will be some pain in egg retrieval, you can inject anesthesia drugs, if there are not many follicles, you can not use anesthesia. It is best to observe for two hours after egg retrieval, if there are no abnormal symptoms, there is no need to worry. After egg retrieval, you should rest in bed, do not exercise strenuously, so as not to cause ovarian torsion, not to eat spicy, stimulating food.