Sekiya S, Hafez E S
Obstet Gynecol. 1977 Sep;50(3):288-92.
The placentas of 86 pairs of twins were examined and correlated with the clinical characteristics of the neonate. The incidence of twin pregnancy in this group was 1 : 108 deliveries. Fetal prematurity and associated complications in twin pregnancy were the cause of increased perinatal and neonatal mortality.
对86对双胞胎的胎盘进行了检查，并将其与新生儿的临床特征相关联。该组双胞胎妊娠的发生率为1:108次分娩。双胎妊娠中的胎儿早产及相关并发症是围产期和新生儿死亡率增加的原因。
