There is no such thing as 8 weeks of pregnancy being the most dangerous, there are dangers throughout pregnancy that need to be taken care of. In the early stages of pregnancy, the fetus is in an unstable state in all aspects. If the pregnant woman is tired, stays up late, is exposed to harmful substances, has sex, etc., it may lead to embryo deformity, miscarriage, and termination of pregnancy. The 8th week of pregnancy will be more dangerous, but there is no such thing as the most dangerous. Although the fetus is stabilized in mid-pregnancy, external stimuli such as trauma and infection can also affect fetal development and lead to miscarriage and fetal malformation. Pregnant women in late pregnancy also need to pay attention to the possibility of placental abruption, preterm labor, etc., and the fetus in the uterus may also suffer from hypoxia, etc. or even fetal death in the uterus. The whole pregnancy needs to pay attention to the whole process, to do a good job of regular obstetric examination, if the fetus has abnormalities timely treatment.