This is a case report of a 29-year-old woman who obtained pregnancy two and a half years after a heart transplant due to Danon syndrome. Pregnancy was planned and spontaneous. The fetus did not have Danon syndrome. At the frequent pregnancy visits, maternal echocardiography and fetal ultrasound examinations were reassuring. In gestational week 36+6, high blood pressure and subjective symptoms of severe pre-eclampsia occurred. A healthy boy (3,070 g) was born after an acute caesarean section. Blood pressure normalized rapidly, and the family was discharged on day four after delivery.