Table 5.
Reason for caesarean section following IOL for all women with prolonged pregnancy according to maternal BMI category at pregnancy booking (n = 725)
| Maternal BMI category | ||||
|---|---|---|---|---|
| Underweight (n = 31) | Normal weight (n = 249) | Overweight (n = 250) | Obese (n = 195) | |
| Cord presentation (%) | 3.2 | 1.6 | 0.0 | 1.6 |
| Cephalopelvic disproportion (%) | 3.2 | 2.0 | 0.8 | 0.5 |
| Deep transverse arrest (%) | 3.2 | 2.0 | 2.0 | 1.5 |
| Delay stage 1 (%) | 35.5 | 36.5 | 36.0 | 36.4 |
| Delay stage 2 (%) | 9.7 | 10.8 | 8.8 | 10.3 |
| Fetal distress (%) | 38.7 | 35.3 | 41.6 | 39.0 |
| Unsuccessful induction (%) | 3.2 | 3.6 | 8.0 | 8.7 |
| Unsuccessful forceps/ventouse (%) | 0.0 | 2.8 | 1.6 | 1.5 |
| Maternal request (%) | 3.2 | 1.6 | 0.8 | 0.5 |
| Other* (%) | 3.2 | 5.2 | 0.4 | 2.6 |
*
Other includes: unstable position (2.0%), undiagnosed breech (0.5%) previous difficult vaginal delivery (0.5%), cervical stenosis (0.4%), antepartum haemorrhage (0.4%), previous caesarean section (0.4%), and placenta praevia (0.8%).