Methods
This study retrospectively analyzed the clinical data of 999 patients with CHD who were admitted to our hospital between January 2010 and December 2019 (Figure 1 ). Patients were divided into surgical and non-surgical group, and the differences of obstetric events, cardiovascular events, delivery procedure, fetal events, and other events between the two groups were compared. Obstetric events included hypertension during pregnancy, placenta previa, gestational diabetes, placental abruption, hemorrhage, pre-term delivery, and preeclampsia. Cardiovascular complications included heart failure (HF), arrhythmias, and thromboembolic events such as stroke and pulmonary embolism. Delivery procedure included cesarean section (CS), artificial rupture of the membranes, and induction. Fetal events included fetal distress, fetal growth restriction, fetal malformation, fetal death or stillbirth, and low birth weight (LBW). Moreover, there were other events like pulmonary hypertension (PH), Eisenmenger syndrome (ES), death, respiratory diseases, and systemic hypertension. Meanwhile, all patients and their offspring were followed up by telephone.