Table 1 Demographics of subjects

Total

3737

Obstetrics

3378

90.39

 Couples

948

56.13^a

 Singulars

1482

43.87^a

Assisted reproduction

359

9.61

 Couples

101

52,65^b

 Singulars

157

47.35^b

Patient’s age (years)

 ≤ 24

98

2.62

 25–29

1411

37.76

 30–34

1432

38.32

 35–39

594

15.90

 ≥ 40

202

5.41

Pregnancy status of female (weeks)

 Not pregnancy

1199

49.14^c

 Pregnancy

1241

50.86^c

  ≤ 13

525

42.30^d

  14–28

481

38.76^d

  ≥ 29

235

18.94^d