There may be more than one high-risk factor or several at the same time, and the degree of high-risk is also graded.
Health education includes pre-pregnancy and post-pregnancy Before pregnancy, women who are sick or over 35 years old should do pre-pregnancy examination and consultation, and stay away from dangerous working environment and unfavorable living environment. After pregnancy, the main thing is to balance the diet, do a good job in nutrition management and have regular pregnancy tests. Regular pregnancy tests are very important, such as Down's screening and ultrasound "big abnormality" examination, which allows doctors to find abnormal situations in time and intervene.