Pregnant women in the new pregnancy, the situation of the fetus in the abdomen is particularly concerned, especially want to understand the situation of the fetus in the abdomen, want to know whether there is a fetal heart, in order to determine whether the fetus is safe, a lot of pregnant mothers are not clear when there can be a fetal heart, at home, just measured the pregnancy in the hospital to check, so, how many months of pregnancy have a fetal heart? In the case of women with regular menstruation, generally 6 weeks of pregnancy can be seen in the original heart tube beat, that is, the fetal heart, but for women with irregular menstruation, such as this time there is no fetal heart, do not be too nervous, it may be a late implantation, the development of late, at the latest in the pregnancy of 8 weeks on the emergence of the fetal heart, such as 8 weeks after the emergence of the fetal heart, that is, there is the possibility of embryonic stagnation. For first time pregnant mothers, do not worry too much if there is a case of embryonic decontamination, embryonic decontamination is the product of the law of survival of the fittest, but if there are 3 or more times in a row of embryonic decontamination, it is not normal, and you need to check the cause of embryonic decontamination. Some people think that embryonic sterilizations are related to air pollution, water pollution and other factors. There are many reasons for embryonic sterilizations, such as endocrine disorders, embryonic development is a systematic process, such as endocrine abnormality, both may cause miscarriages, due to uterine abnormalities caused by miscarriages is also one of the common reasons, such as repeated embryonic sterilizations, and can not find the reason for it, for the re-pregnancy of preterm abortion, blind birth control is not the best way to prevent pregnancy, but it is not a good idea. In this case, it is not desirable to blindly preserve the fetus, so, we must go to the regular hospital for further examination to find out the cause of embryonic failure, targeted treatment, rather than blindly preserving the fetus treatment, and do not indiscriminate use of medication, drugs in early pregnancy will have a great impact on the fetus.