Table 1 Demographics of the patients with fore-lying or prolapse of the umbilical cord among the singleton vertex cases

Maternal

 Age

32.3 ± 5.0

31.9 ± 5.3

0.66

 Gravida

0.5 (0–4)

0 (0-1)

0.49

 Parity

1 (0–4)

0 (0–3)

0.50

 Height (cm)

158.0 ± 5.8

156.8 ± 5.5

0.30

 Weight at delivery (kg

63.2 ± 9.4

63.3 ± 10.3

0.98

Neonatal

 Gestational weeks

37.2 ± 4.6

38.9 ± 1.9

<0.01

 Birth weight (g)

2677 ± 805

2677 ± 805

0.07

 Apgar score 1 min.

6 (0–10)

8 (0-9)

0.50

      5 min.

9 (0–10)

9 (0-10)

0.62

 Umbilical artery pH

7.23 ± 0.15

7.21 ± 0.14

0.37

 Base Excess

−7.0 ± 6.4

−6.4 ± 4.6

0.68

 Intrauterine fetal death

4.5% (4)

2.2% (2)

0.43

Other risk factor of umbilical cord prolapse

 Low-lying placenta

0% (0)

0% (0)

1.00

 Abnormal placental insertion

9.1% (8)

3.2% (3)

0.13

 Polyhydroamnios

4.5% (4)

2.2% (2)

0.43

 Oligohydramnios

0% (0)

2.2% (2)

0.50

Diagnosis

 Fore-lying

10.2% (9)

15.1% (14)

0.38

 Prolapse

   at spontaneous ROM

29.5% (26)

40.9% (38)

0.16

   at amniotomy

28.4% (25)

19.4% (18)

0.22

   after a while ROM

31.8% (28)

24.7% (23)

0.32