宫内胎儿一胎儿间的输血,发生于单绒毛膜胎盘的挛生儿。他们之间有血管吻合通常情况下,动脉-动脉间吻合,无重要性,静脉-静脉间吻合很少发生,动脉-动脉和静脉-静脉同时吻合。可导致无心畸胎,重要的是动脉-静脉间吻合。双胎之间血红蛋白相差3.3g/dl以上时,应考虑胎儿-胎儿间的输血。供血者可导致贫血,症状和贫血的程 Intrauterine fetal transfusion between a fetus, occurs in the single chorionic placenta of the twins. Vascular anastomosis between them usually, arterial - artery anastomosis, no importance, venous - venous anastomosis rarely occurs, arterio - arterial and venous - vein at the same time. Can lead to unintentional teratogenesis, it is important arterial - venous anastomosis. Differences in hemoglobin between the twins 3.3g / dl or more, should consider fetal-fetal transfusion. Blood donors can cause anemia, symptoms and anemia