Fetal sterilization refers to the death of the embryo when it reaches a stage of development and stops developing. During the development of the fertilized egg, if some conditions are encountered, the fertilized egg will stop growing healthily. The first factor that leads to fetal sterilization are 1, genetic factors: if chromosomal abnormalities, genetic gene defects, common sperm or egg chromosomal abnormalities. 2. Insufficient hormone secretion to support the embryo development and cause death. 3.Uterine cavity malformation makes the embryo unable to grow. 4. Viral infection during pregnancy, exposure to radioactive substances, toxic chemicals, drugs prohibited during pregnancy, high temperature, microwave, noise, excessive stimulation, etc. 5, maternal factors: such as poor physical condition or diseases, cervical atresia, luteal insufficiency, endometriosis, immune factors, diabetes, hyperthyroidism, etc. 6, male factors: such as a large number of bacterial growth in the semen, sperm deformity rate, etc. The first thing you need to do is to take a look at the actual website. 2, pre-conception preparation: women should have a proper preparation period, pay attention to a balanced diet, regular life, exercise and pre-conception checkups, etc., and actively participate in the health classes prepared by the Women and Infants Hospital for mothers-to-be, communicate more with the doctor, and understand all aspects of pre-conception, pregnancy, and postpartum knowledge of pregnancy. 3. Timely examination: Generally, the embryo has a fetal heart around 8 weeks, and fetal abortion may occur at 8D12 weeks, so it is recommended that pregnant women should go for ultrasound at around 8 weeks to check the development of the fetus and placenta early. If a fetal heart appears, you can roughly rest assured. 4.Miscarriage treatment: When the pregnant mother is unfortunately diagnosed with fetal stoppage, she should not panic and usually needs to do abortion treatment under the guidance of the doctor. Unlike early pregnancy, abortion is not easy to be completely eliminated by medication. If the residue remains in the uterus for a long time, it will cause intrauterine infection and damage the endometrium, which will then lead to tubal occlusion and infertility. 5, half a year before pregnancy: women who have had a fetal abortion, from the perspective of eugenics, at least six months afterwards before pregnancy, because it takes at least two or three months for the human ovarian function to recover, and at least six months for the endometrium to recover. If the new endometrium has not yet grown well and you get pregnant again, the endometrium will be thin and the fertilized egg will not be easily laid or shed easily, which will cause another miscarriage. Generally speaking, women who have had a miscarriage should get pregnant again at least six months later from the perspective of eugenics, because it takes at least two to three months for the ovarian function to recover and at least six months for the endometrium to recover.