Effect of different modes of delivery on cord blood oxidative stress markers

Normal pregnancy has been associated with oxidative stress injury. Oxidative stress has been linked with poor perinatal outcome and birth asphyxia. The severity of this oxidative stress in newborn may be related to stress of different modes of delivery.

Eighty seven newborn babies were recruited in both labour ward and operating theatre of Ladoke Akintola University of Technology Teaching Hospital, Osogbo, Nigeria. Fourty one of them was delivered via spontaneous vertex delivery, 26 via emergency caesarean section and the rest, 20 were delivered through elective caesarean section. Cord blood sample was collected from new born babies immediately after delivery. Plasma was extracted and used for the laboratory measurement of total antioxidant status, malondialdehyde and Uric acid.

There were no significant (P>0.05) changes among the studied groups in mean plasma levels of malondialdehyde, total antioxidant status and uric acid. However, a trend was observed in these parameters. Mean plasma total antioxidant status/mmol/l was observed to be highest in subjects delivered through ECS (2.35 ± 0.05) and lowest in subjects delivered through SVD (2.03 ± 0.08). Similarly mean plasma UA/mg/dl was also observed to be highest in subjects delivered through ECS (3.61 ± 0.16) lowest in those delivered through SVD (3.49 ± 0.71). The highest mean plasma level of MDA/µmol/l was found in subjects delivered through SVD (5.78 ± 1.56) while the lowest was found in subjects delivered through ECS (5.01 ± 1.21).

There is no significant relationship between oxidative stress markers in neonate and the mode of delivery.