Studies have shown that about 75% of all human pregnancies end in spontaneous miscarriage. Most embryonic babies stop developing soon after implantation and only show up as menstruation or delayed menstruation, which is called early pregnancy miscarriage, and this is the pregnancy experience that women don’t know about. In fact, the majority of fertilized eggs reach the uterus during pregnancy preparation, but about 40% of them do not successfully implant, and of those that do, 60% die within 12 days of implantation. Even if the fertilized egg is successfully implanted and develops, there is still a 20% chance that it will miscarry within 3 months of conception. For those of you who are preparing for pregnancy, if you have intercourse without contraception, but your period is delayed and then suddenly comes again two days later, you should be careful because it could be a spontaneous miscarriage. Why did the baby leave again after coming? A biochemical pregnancy is an early miscarriage that occurs within 5 weeks of gestation, where an elevated HCG of more than 25 mlU/mL can be detected in the blood or a positive urine pregnancy test, but the gestational sac is not visible on ultrasound, suggesting a failure of fertilization, also known as a “subclinical miscarriage”. This type of spontaneous abortion within 5 weeks of pregnancy is often mistaken for menstruation because the bleeding time is not much different from the time of menstruation, and without HCG monitoring, the woman will not know that her body has experienced a pregnancy. There are several reasons for the occurrence of biochemical pregnancy: 1, the fertilized egg itself has defects It is generally believed that embryonic chromosomal abnormalities may be the main cause of biochemical pregnancy, more than 50% of early miscarriages in the first trimester of pregnancy are due to chromosomal abnormalities. 2, poor ovarian corpus luteum function Poor corpus luteum leads to insufficient secretion of luteinizing hormone and abnormal endometrium, which affects the fertilized egg’s implantation in the uterus. 3, uterine factors Uterine dysplasia, submucosal fibroids, endometrial polyps, uterine adhesions, endometrial tuberculosis, etc. affect the fertilized egg’s fertilization. 4. Genetic factors Due to genetic factors, the number or structure of chromosomes is abnormal, resulting in embryonic dysplasia, and the dysplastic embryos will be aborted naturally. The genetic factors account for 60% to 70% of the embryonic dysplasia. 5, the influence of external factors Women who do not know they are pregnant smoking (including second-hand smoke), drinking alcohol, exposure to chemical toxins, serious noise and vibration, abnormal emotional excitement, high temperature environment, etc., can lead to placental and fetal damage, resulting in miscarriage. 6, disease viruses Women who are sick after pregnancy, the body infected with disease viruses, viruses can affect the fertilized egg baby, affecting its development, can cause miscarriage. Is biochemical pregnancy a bad thing? For sisters who have been preparing for pregnancy for a long time, it is indeed a pity that the baby is naturally aborted, but in a sense, this natural abortion may not be a good thing. If it is a poorly developed embryo, natural abortion can reduce the birth of deformed children, and if the woman’s own conditions are not suitable for conception, she cannot force the fetus to develop in it. Because there are many reasons for spontaneous abortion, abnormal development of the pregnant egg or embryo may be the main factor. According to surveys, more than 70% of embryos that are spontaneously aborted during the first trimester have abnormal morphology. Abnormalities in the gestational egg may be due to defects in the sperm and egg, including abnormalities in their chromosome number and structure. In other words, the vast majority of sickly fetal babies are eliminated naturally by miscarriage. Therefore, miscarriage is in a sense a natural selection of superiority and inferiority. Some sisters may think that they can’t just miscarry because they can’t get pregnant easily. So they try their best to keep the baby. However, from the perspective of eugenics, this practice is not advisable, especially for young couples, who may give birth to a deformed fetus or a child with mental retardation in the future. The reason is that progesterone injections are often given for the purpose of suppressing uterine atrophy and promoting meconium growth for embryonic development. However, the use of progesterone in early pregnancy can increase the risk of heart defects in the fetus, and in female babies, it can also cause masculinization of the genitals and pseudo-hermaphroditism, which is counterproductive. How to avoid biochemical pregnancy and keep the fetus safely? Those couples who are eager to have children have done all the homework to prepare for pregnancy but never quite as expected, so it is important to avoid the occurrence of a baby that is easily conceived and hurriedly spontaneous abortion, to avoid biochemical pregnancy, what should we do? 1, within six months after the occurrence of miscarriage to contraception, to be six months after the pregnancy again, can reduce the occurrence of miscarriage; 2, to do genetic examination, the couple at the same time to receive chromosomal examination; 3, to do blood type identification, including Rh blood type identification; 4, with the endometrial relaxation, can do endogastric suture ligation; 5, for luteal insufficiency treatment of drugs, the use of time to exceed the last miscarriage of pregnancy period, such as If the last miscarriage was in the third trimester, the treatment time should not be less than 3 months from the beginning of the pregnancy; 6. If the thyroid gland function is low, we should wait for the thyroid gland function to return to normal before getting pregnant, and we should also take anti-low thyroid medication during pregnancy; 7. 9. Avoid contact with toxic substances and radioactive substances.