A large amount of obstetric statistics and survey data show that various abnormalities during pregnancy and delivery (miscarriage, premature delivery, dystocia, etc.) are largely caused by pregnant women neglecting self-care. In a sense, this is their own \”mistake\”. To sum up, there are 19 common types as follows: 1. Failure to check in time for suspected pregnancy. Many pregnant women do not take it seriously when they start to experience some early pregnancy symptoms. They neither told their relatives in time nor took the initiative to seek medical treatment.