A woman’s life in addition to the normal pregnancy, there are likely to be a lot of pregnancy experience they do not know, perhaps before you have time to react, Ta has “quietly gone”. The first thing you need to do is to get a good idea of what you are getting into. When it comes to “biochemical pregnancy”, many patients who are preparing for pregnancy are afraid of it. But do you really know about biochemical pregnancy? Is a biochemical pregnancy bad? Let’s learn more about it. Studies have shown that about 75% of all human pregnancies end in spontaneous abortion, and most embryonic babies stop developing soon after they are laid, and only show up as menstruation or delayed menstruation, which is early pregnancy abortion, and this is the pregnancy experience that women do not know. 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 pregnancy. For those who are preparing for pregnancy, if you have intercourse without contraception, but your period is delayed and then suddenly comes again in two days, you should be careful, it may be a spontaneous miscarriage. 1. Why did the fetal baby come and leave again? It is a biochemical pregnancy. A biochemical pregnancy is an early miscarriage that occurs within 5 weeks of gestation, where elevated HCG can be detected in the blood, greater than 25 mlU/mL or a positive urine pregnancy test, but the gestational sac is not visible on ultrasound, and the egg and sperm are united but do not return to the uterus for implantation, or they return and do not get laid. It is also known as “subclinical miscarriage”. This kind 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, women will not know that their bodies have experienced pregnancy. 2, in general, the causes 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 are due to chromosomal abnormalities. (2) Poor ovarian corpus luteum function Poor corpus luteum leads to insufficient secretion of progesterone and abnormal endometrium, which affects the fertilized egg’s implantation in the uterus. (3) Uterine factors Uterine dysplasia, submucosal fibroids, endometrial polyps, uterine adhesions, and endometrial tuberculosis affect the fertilized egg’s implantation. (4) Genetic factors Abnormal number or structure of chromosomes due to genetic factors lead to embryonic dysplasia, and the dysplastic embryos will be spontaneously aborted. Genetic factors account for 60% to 70% of embryonic dysplasia. (5) Influence of external factors Smoking (including second-hand smoke), drinking alcohol, exposure to chemical poisons, severe noise and vibration, abnormal emotional excitement, and high temperature environment without women knowing they are pregnant can lead to placental and fetal damage and cause miscarriage. (6) Disease viruses Women who are sick after pregnancy and infected with disease viruses in their bodies, the viruses can affect the fertilized egg baby and affect its development, which can cause miscarriage. 3.Is biochemical pregnancy a bad thing? The natural selection of superiority and inferiority. 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, the fetus cannot be forced to develop inside. 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. So miscarriage is in a sense a natural selection of superiority and inferiority. 4, blind birth control is not advisable! Some pregnant mothers think that it is not easy to get pregnant, how can they say that the flow on the flow? The actual fact is that you will not be able to get a good deal on your own. This is not advisable from a eugenic point of view, especially for young couples, who may give birth to deformed fetuses or children who are mentally backward 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 for female babies, it can also cause masculinization of the genitals and pseudohermaphroditism, which is counterproductive. 5, how to avoid biochemical pregnancy, so that the fetus safely left behind? Those couples who are eager to have children do all the homework to prepare for pregnancy but never quite as expected, then it is important to avoid the occurrence of natural abortion in a hurry, to avoid biochemical pregnancy, what should we do? (1) Contraception should be used within six months after the miscarriage, and the miscarriage can be reduced by getting pregnant again after six months. (2) Genetic examination should be done, and both spouses should be examined for chromosomes at the same time. (3) To have blood group identification, including Rh blood group identification. (4) For those who have a loose endometrium, an endograft suture may be done. (5) Medication for treatment of luteal insufficiency should be used for a period longer than the duration of pregnancy from the last miscarriage, and if the last miscarriage was in the third trimester, the treatment should not be less than three months from the beginning of pregnancy. (6) If you have low thyroid function, wait until thyroid function returns to normal before getting pregnant, and take anti-low thyroid medication during pregnancy. (7) Pay attention to rest, avoid intercourse (especially during the gestation period of the last miscarriage), emotional stability and regular life. (8) The male partner should have a reproductive system examination, and those with bacteriospermia should be treated thoroughly before conceiving his wife. (9) Avoid exposure to toxic substances and radioactive substances.