There is no direct relationship between fetal ventricular septal defect and the amount of amniotic fluid, and it does not cause an increase in the amount of amniotic fluid. Fetal ventricular septal defect is a congenital heart disease, a malformation of fetal heart development, and is not directly related to the amount of amniotic fluid. Excessive amniotic fluid may trigger the risk of preterm labor, umbilical cord prolapse, and premature rupture of membranes. When the amount of amniotic fluid is excessive, it is necessary to promptly investigate whether the fetus has chromosomal abnormalities, abnormal development of the urinary system and other factors affecting the fetus, but also physiological excess amniotic fluid, such as an increase in the amount of fluid intake. In addition, pregnant women who suffer from gestational diabetes are also prone to increased amniotic fluid. Pregnant women with excessive amniotic fluid should undergo a comprehensive examination, and need to pay attention to rest, avoid excessive fatigue, as well as emotional stability, control fluid intake.