Evaluation of Maternal Fetal Cardiac Structure and Function in Pregnancies With Cardiovascular Disease

Maternal and fetal echocardiography：Time points for heart image acquisition in pregnant women: As per the Guidelines for Pre-pregnancy and Pregnancy Health Care (2018) formulated by the Obstetrics Group of the Gynecology Branch of the Chinese Medical Association, a total of five echocardiographic examinations will be performed in the first trimester(11-14 weeks of gestation), the second trimester(20-24 weeks of gestation), the third trimester(29-32 weeks of gestation), prenatal term (37-40 weeks of gestation), and 3-6 months after delivery. Time points for fetal heart image acquisition: Fetal heart images will be collected in the second trimester(20 to 24 weeks of gestation).