Table 1 Demographic characteristics of the study population

No. of women

44

22

Nulliparous women

21 (48%)

14 (64%)

0.222

Age (year)

32.2 ± 4.5

31.5 ± 5.5

0.754

Pre-pregnancy BMI (kg/m²)

21.5 ± 3.4

20.1 ± 2.2

0.128

Pre-pregnancy BSA (m²)

1.54 ± 0.10

1.48 ± 0.11

0.023

Gestational week at delivery

38.8 ± 1.4

36.7 ± 1.4

< 0.001

Cesarean delivery

18 (41%)

21 (95%)

< 0.001

 monochorionic diamniotic

12

 dichorionic diamniotic

10

Newborn weight, kg^a

3.1 ± 0.4

4.4 ± 0.6

< 0.001

No. of tests^b given in 66 women

166

83

No. of the tests^b per woman

3.8 ± 0.4

3.8 ± 0.4

1.000

 Second trimester, weeks

25.3 ± 1.0 [42]

25.0 ± 1.0 [18]

0.202

 Third trimester, weeks

35.7 ± 2.8 [42]

35.4 ± 0.4 [21]

0.709

 PP1 (postpartum day 2–7)

3.2 ± 0.8 [41]

3.6 ± 1.1 [22]

0.171

 PP2 (postpartum day 23–39)

31.0 ± 3.9 [41]

30.8 ± 2.7 [22]

0.901