Characteristics

Cases (n = 100)

Maternal age (y)

<20

20 - 34

≥35

1 (1%)

71 (71%)

28 (28%)

Parity

0

1 - 3

40 (40%)

60 (60%)

Maternal history

Previous cesarean section

Premature delivery

Chronic hypertension or pregnancy induced hypertension

27 (27%)

10 (10%)

6 (6%)

Smoking by

Woman

Partner

0 (0%)

27 (27%)