组别

孕周

蜕膜

绒毛

实验组(n = 27)

<28

24.8 ± 2.1^*

24.6 ± 2.2^*

28~32

27.6 ± 3.2^*

27.4 ± 3.1^*

>32

30.2 ± 3.5^*

29.8 ± 3.4^*

对照组(n = 27)

<28

22.2 ± 1.8

21.2 ± 1.7

28~32

24.3 ± 2.5

23.4 ± 2.3

>32

27.6 ± 3.1

25.5 ± 3.3