Objective To research pelvic changes of twin-pregnant women in third trimester using transperineal pelvic ultrasound and to provide scientific basis for postpartum recovery.Methods Twenty-five twin-pregnant women (group Ⅰ), 25 singleton pregnant women (group Ⅱ) and 20 healthy women without child birth history (group Ⅲ) were selected as study subjects.Pelvic ultrasound examination was performed in late pregnancy, and anterior pelvic organ parameter was measured, recorded and analyzed.Results There was no significant difference in age and height among three groups (F value was 0.048 and 0.006, respectively , both P>0.05).Increase of BMI in group Ⅰ was more than that in group Ⅱ (t=3.892, P<0.05).There was significant difference in Djx, Dvx, △D, βj, βv, αj and αv among three groups (F value ranged 10.900-32.757, all P<0.05).Group comparison showed that difference in Djx, Dvx, △D, βj, βv, αj and αv between group Ⅰ and group Ⅲ was significant (t value ranged 8.782-30.371, all P<0.05), Difference in Dvx, △D, βj, βv, αj and αv between group Ⅱ and group Ⅲ was significant (t value ranged 9.153-29.352, all P<0.05), and difference in Djx, △D and βv between group Ⅰ and group Ⅱ was significant (t value ranged 6.672-32.562, all P<0.05).BMI increase of pregnant women and fetal body mass were negatively correlated with △D (r value was-0.917 and-0.795, respectively, both P<0.05).Conclusion BMI increase of twin-pregnant women is significantly more than that of singleton pregnant women.Their many anterior pelvic organ parameters are affected, so postpartum recovery treatment should be done in advance.%目的 探索应用经会阴盆底超声观察妊娠晚期双胎孕妇盆底的改变,以期为其产后康复提供科学依据.方法 选取2015年1月至2016年12月在西安交通大学第二附属医院住院分娩的25例双胎孕妇(Ⅰ组)、25例单胎孕妇(Ⅱ组),20例健康未生育女性(Ⅲ组)作为研究对象,于妊娠晚期进行盆底超声检查,测量前盆腔脏器参数,记录并统计分析.结果 ①三组间年龄、身高无统计学差异(F分别为0.048、0.006,均P>0.05),Ⅰ组BMI增加量多于Ⅱ组(t=3.892,P<0.05);②三组间Djx、Dvx、△D、βj、βv、αj、αv值差异有统计学意义(F10.900~32.757,均P<0.05),组间两两比较:Ⅰ组与Ⅲ组,Djx、Dvx、△D、βj、βv、αj、αv值有统计学意义(t8.782-30.371,均P<0.05);Ⅱ组与Ⅲ组,Dvx、△D、βj、βv、αj、αv值有统计学意义(t值9.153~29.352,均P<0.05);Ⅰ组与Ⅱ组,Djx、△D、βv值差异有统计学意义(t=6.672~32.562,均P<0.05);③孕妇BMI增加量、胎儿体质量与△D均为负相关(r值分别为-0.917、-0.795,均P<0.05).结论 双胎孕妇BMI增量明显多于单胎孕妇,其盆底前盆腔脏器多个参数受到影响,产后康复应提早进行.
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