After an in vitro transfer, it is normal to have a blood level of estradiol between 100-500 pg/ml. Estradiol is an estrogen that promotes the proliferation of the endometrium and enhances the contraction of the smooth muscle of the uterus to maintain the characteristic female sex characteristics. If the estradiol level is low after in vitro transfer, the endometrial lining will be thin, which will affect the fertilization of the egg. If the estrogen level is low, you can choose estrogen supplementation therapy under the guidance of your doctor. After IVF transplantation, you should eat a light diet, avoid spicy and stimulating food, and do not eat cold and raw food to avoid stomach discomfort; you can eat more beans, such as soy bean sprouts, soy milk, etc. Soy products contain the natural estrogen soy isoflavone, which is good for estrogen supplementation. After in vitro transplantation, sexual intercourse should not occur within 3 months, otherwise it may cause miscarriage. In addition, usually pay attention to avoid lifting heavy objects, pay attention to rest and keep the vulva hygiene.