Table 1 Clinical information of subjects in the study

Age (years)

28.6 ± 2.92

28.85 ± 2.97

29 ± 2.95

28.9 ± 2.98

30.74 ± 3.51

0.002^c

BMI (kg/m2)

21.7 ± 2.5

21.93 ± 2.51

24.55 ± 2.75^a

27.16 ± 2.73^b

29.76 ± 4.07

0.000^c

Gestational week for serum collection (week)

-

8.81 ± 2.58

21.28 ± 3.72^a

39.68 ± 0.94^b

36.52 ± 2.78

0.000^c

Gestational week of delivery(week)

-

-

-

39.82 ± 0.96

36.77 ± 2.42

0.000^c

Primigravida

41/60

38/60

37/60

36/60

78/100

0.015^c

Systolic blood pressure (mmHg)

115.1 ± 7.74

112.15 ± 7.90

112.20 ± 8.05

113.2 ± 7.88

157.22 ± 10.34

0.000^c

Diastolic blood pressure (mmHg)

73.95 ± 3.48

73.4 ± 3.24

73.5 ± 3.24

72.05 ± 3.52

105.54 ± 8.0

0.000^c