Whether 9 weeks of pregnancy is the most dangerous time, can not be generalized, theoretically before 12 weeks of pregnancy are more dangerous, because the fetus is still unstable, but in 9 weeks of pregnancy at this time because of gestational luteinization began to disappear, so need to pay more attention to it. Nine weeks of pregnancy is still in the early stages of pregnancy, this time the embryo is not yet stable, coupled with the luteinization of pregnancy begins to disappear, then the lack of progesterone secretion, it is easy to lead to early miscarriage, so it is more dangerous. At this time the placenta began to gradually form alternative hormones to maintain the growth and development of the embryo, but also susceptible to environmental factors, easily induced miscarriage. 9 weeks pregnant still need to supplement folic acid, pay attention to the diet of light and easy to digest, it is recommended to avoid large emotional fluctuations, pay attention to rest, do not overwork. If any abnormality occurs, it is recommended to consult a doctor in time.