“…No obvious difference was found between surgically induced labours and spontaneous labours. Differences might, however, be obscured by associations between prenatal and postnatal factors; for instance, neonatal jaundice is less common in children of toxaemic than of nontoxaemic mothers (Barton, Wilson and Walker, 1962;Wood, Culley, Waterhouse and Powell, 1962). Therefore expected numbers of children with diplegia were calculated allowing for the effect of jaundice and respiratory difficulties (see Appendix).…”