Coexistence of Suspected Tetralogy of Fallot With Absent Pulmonary Valve and Dextrocardia in Pre-Gestational Diabetes Mellitus: A Case Report.

Early fetal echocardiography and serial surveillance are crucial in pregnancies complicated by pregestational diabetes. Tetralogy of Fallot with absent pulmonary valve syndrome may cause progressive cardiomegaly, ventricular hypertrophy, hydrops, and fetal demise. Timely diagnosis enables informed parental counseling and multidisciplinary perinatal planning.