The main causes of the death of one fetus in twin pregnancy were cord elements(5 cases), fetal deformity(3 cases), velamentous insertion(4 cases)and unknown etiology(15 cases).
双胎之一胎儿死亡主要原因：脐带因素5例、胎儿畸形3例、帆状胎盘4例、原因不明15例。
2
With the umbilical cord blood of the boy, a marrow transplant operation will be done soon and the twin girls' lives will be saved.