The tests for twins at 11 weeks include routine blood test, urine test, ultrasound, etc. Twins are multiple pregnancies and mothers must pay attention to the labor and delivery tests and be on time. Required tests are as follows: blood test, urine test, liver and kidney function, fasting blood glucose, hepatitis B surface antigen, ultrasound in early pregnancy, and so on. The screening for hepatitis C virus, anti-D titer (Rh-negative) to avoid neonatal hemolysis, screening for thyroid function, cervical cytology, maternal serology for aneuploidy in early pregnancy, ultrasonography to measure the thickness of the nuchal translucency, fetal chorionic villus biopsy, and electrocardiogram are all necessary. Twin pregnancy is a high-risk pregnancy, prone to hypertensive disorders of pregnancy, fetal developmental abnormalities, etc., the mother and her family should pay attention to and complete the relevant examination programs in a timely manner. A comprehensive examination can not only determine the health of the fetus, but also learn about the health of the pregnant woman herself. Every pregnant woman should pay attention to do a good job of prenatal checkups during pregnancy, and actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, which can effectively ensure the safety of the delivery.