Abstract：
UNASSIGNED: It was to explore the ultrasonic characteristics of complications of twin pregnancies with monochorionic diamniotic (MCDA) during various pregnancy periods and the differences in pregnancy outcomes.
UNASSIGNED: One hundred pregnant women with MCDA were included in the study. They were rolled into a complication group (44 cases) and a non-complication group (56 cases) according to whether they had complications. The pulsatility index (PI), resistance index (RI), and systolic/diastolic (S/D) values of ultrasound in pregnant women and the final neonatal situation at each time period were compared and analyzed.
UNASSIGNED: In pregnant women with twin-twin transfusion syndrome (TTTS), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05). Compared to the group without complications, the incidence of neonatal death was significantly increased in the complication group, and the newborn\'s weight, length, head circumference, and Apgar score were significantly lower (P < .05). In pregnant women with selective intrauterine growth restriction (sIUGR), the RI and PI values of the larger twin were significantly higher than those of the smaller twin during pregnancy, and S/D values were significantly lower (P < .05). The newborns in the group without complications had significantly higher body weight, length, and head circumference (P < .05). In pregnant women with gestational diabetes mellitus (GDM), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05), and there were no significant differences in other indicators compared to the group without complications. In pregnant women with premature rupture of membrane (PROM), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05), but the newborns in the group without complications had significantly higher weight, length, Apgar score, and lower incidence of neonatal death (P < .05). In pregnant women with preeclampsia (PE), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05), and there were no significant differences in other indicators compared to the group without complications (P > .05).
UNASSIGNED: Pregnant women with sIUGR had significantly higher RI and PI values in the larger twin and significantly lower S/D values compared to the smaller twin during pregnancy, while no significant differences were observed for other complications. The combination of TTTS and PROM decreased the birth weight, body length, head circumference, and Apgar score of twins and increased the mortality rate.
UNASSIGNED: One hundred pregnant women with MCDA were included in the study. They were rolled into a complication group (44 cases) and a non-complication group (56 cases) according to whether they had complications. The pulsatility index (PI), resistance index (RI), and systolic/diastolic (S/D) values of ultrasound in pregnant women and the final neonatal situation at each time period were compared and analyzed.
UNASSIGNED: In pregnant women with twin-twin transfusion syndrome (TTTS), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05). Compared to the group without complications, the incidence of neonatal death was significantly increased in the complication group, and the newborn\'s weight, length, head circumference, and Apgar score were significantly lower (P < .05). In pregnant women with selective intrauterine growth restriction (sIUGR), the RI and PI values of the larger twin were significantly higher than those of the smaller twin during pregnancy, and S/D values were significantly lower (P < .05). The newborns in the group without complications had significantly higher body weight, length, and head circumference (P < .05). In pregnant women with gestational diabetes mellitus (GDM), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05), and there were no significant differences in other indicators compared to the group without complications. In pregnant women with premature rupture of membrane (PROM), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05), but the newborns in the group without complications had significantly higher weight, length, Apgar score, and lower incidence of neonatal death (P < .05). In pregnant women with preeclampsia (PE), there was no significant difference in RI and S/D values between the larger and smaller twin during pregnancy (P > .05), and there were no significant differences in other indicators compared to the group without complications (P > .05).
UNASSIGNED: Pregnant women with sIUGR had significantly higher RI and PI values in the larger twin and significantly lower S/D values compared to the smaller twin during pregnancy, while no significant differences were observed for other complications. The combination of TTTS and PROM decreased the birth weight, body length, head circumference, and Apgar score of twins and increased the mortality rate.
摘要：
■探讨双胎妊娠不同时期单绒毛膜羊膜病(MCDA)并发症的超声特征及妊娠结局的差异。
■100名患有MCDA的孕妇被纳入研究。根据有无并发症分为并发症组(44例)和无并发症组(56例)。搏动指数（PI），阻力指数(RI)，比较分析各时间段孕妇超声检查的收缩压/舒张压(S/D)值及最终新生儿情况。
■在双胎输血综合征（TTTS）的孕妇中，在妊娠期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。与无并发症组相比,并发症组新生儿死亡发生率明显增加,和新生儿的体重，长度,头围,Apgar评分显著降低(P<0.05)。在选择性宫内生长受限（sIUGR）的孕妇中，在怀孕期间，大双胞胎的RI和PI值明显高于小双胞胎，S/D值均显著降低(P<0.05)。无并发症组新生儿体重明显增高,长度,头围(P<0.05)。在妊娠糖尿病（GDM）的孕妇中，在怀孕期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。其他指标与无并发症组相比无显著差异。在胎膜早破（PROM）的孕妇中，在怀孕期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。但是没有并发症组的新生儿体重明显更高，长度,阿普加得分,新生儿死亡发生率较低(P<0.05)。在患有先兆子痫（PE）的孕妇中，在怀孕期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。其他指标与无并发症组比较差异无统计学意义（P>0.05）。
■患有sIUGR的孕妇在怀孕期间，与较小的双胞胎相比，较大的双胞胎中的RI和PI值明显较高，而S/D值明显较低，而其他并发症无显著差异。TTTS和PROM的组合降低了出生体重，身体长度,头围,和Apgar评分的双生子，增加了死亡率。
■100名患有MCDA的孕妇被纳入研究。根据有无并发症分为并发症组(44例)和无并发症组(56例)。搏动指数（PI），阻力指数(RI)，比较分析各时间段孕妇超声检查的收缩压/舒张压(S/D)值及最终新生儿情况。
■在双胎输血综合征（TTTS）的孕妇中，在妊娠期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。与无并发症组相比,并发症组新生儿死亡发生率明显增加,和新生儿的体重，长度,头围,Apgar评分显著降低(P<0.05)。在选择性宫内生长受限（sIUGR）的孕妇中，在怀孕期间，大双胞胎的RI和PI值明显高于小双胞胎，S/D值均显著降低(P<0.05)。无并发症组新生儿体重明显增高,长度,头围(P<0.05)。在妊娠糖尿病（GDM）的孕妇中，在怀孕期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。其他指标与无并发症组相比无显著差异。在胎膜早破（PROM）的孕妇中，在怀孕期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。但是没有并发症组的新生儿体重明显更高，长度,阿普加得分,新生儿死亡发生率较低(P<0.05)。在患有先兆子痫（PE）的孕妇中，在怀孕期间，较大和较小的双胞胎之间的RI和S/D值没有显着差异（P>.05）。其他指标与无并发症组比较差异无统计学意义（P>0.05）。
■患有sIUGR的孕妇在怀孕期间，与较小的双胞胎相比，较大的双胞胎中的RI和PI值明显较高，而S/D值明显较低，而其他并发症无显著差异。TTTS和PROM的组合降低了出生体重，身体长度,头围,和Apgar评分的双生子，增加了死亡率。
