In general, stable diabetes does not affect pregnancy. However, if the condition is serious and there are complications, it may not be easy to get pregnant, or the risk of miscarriage, teratology or macrosomia may increase after pregnancy. Diabetes mellitus is a common endocrine disease. To determine whether diabetes mellitus will lead to pregnancy depends on the actual condition and cannot be generalized. For diabetic patients whose condition is stable, whose blood glucose control is up to standard, and who do not have complications, they will usually get pregnant and it will not affect normal conception. However, if the patient’s condition is unstable, poor glycemic control, the body is in a prolonged state of hyperglycemia, which reduces the ability to conceive, and their own endocrine has been seriously disrupted, there are also ketoacidosis, infections, and other complications, relatively speaking, they may not be able to get pregnant, and even if they succeed in getting pregnant, it is easy to make the development of the embryo is abnormal, and increase the incidence of miscarriage. In conclusion, diabetic patients need to actively cooperate with doctors for standardized treatment, strengthen daily life management, control the development of the disease, and achieve planned pregnancy preparation.