The course of pregnancy and delivery in a patient after Fontan repair of double-outlet right ventricle is herein presented. She uneventfully delivered a healthy infant in good general condition at 38 weeks of gestation through a caesarean section, at 24 years after cardiosurgery. Although the patient demonstrated a good hemodynamic state after the operation and conceived while being clinically stable, a worsening of her general condition was observed. After a 4-year follow-up it was clear that pregnancy and delivery had a harmful effect on her cardiovascular function.