Elective Caesarean section safest form of childbirth BMJ23 November 2007
Sir,
I have a total of 23 years Obstetric experience in the UK, 13 years as a Consultant in a large maternity unit and with 2 years full-time research in perinatal mortality statistics during training. Villar and Colleagues (BMJ 2007;335:1025 (17 November), oi:10.1136/bmj.39363.706956.55 (published 30 October 2007) present data from South America showing that elective Caearean delivery (El CD) is associated with a 1.66 fold increase in risk of neonatal death in cephalic presentation (table 3). This is a worrying statistic for any women deciding the best mode of birth for her baby, and would suggest that a vaginal birth is safer for the baby than El CD.
To estimate this risk for a UK Population I have analysed the comprehensive dataset collected by the Confidential Enquiry for Maternal and Child Health (CMACH), with very different results. During the period 1995 to 2006 there were 780,370 total births in the West Midlands region of England. During that time there were a total of 4054 neonatal deaths (up to 28 days), of which 176 were following El CD. Of these 111 were caused by lethal congenital malformations and an additional 50 were due to prematurity. Amongst this massive cohort there were only 15 deaths following El CD after 37 weeks, with a neonatal mortality rate for El CD at term in normally formed infants of 0.19 per thousand (one in 5,263), compared to the headline figure of 7.7 per thousand (one in 130) presented in your paper. A difference of more than 40 fold. In my opinion the paper, and associated editorial gives the false impression that El CD is a cause of neonatal death. The fact is that elective caesarean section at term is a very safe method of birth for the baby, and is safer (for the baby) than planning vaginal birth. The presentation of data in this way gives me no confidence that the morbidity data, which is much more difficult to quantify, is accurate and unbiased.
I suspect that the vast majority of these cases are in fact deliveries associated with prematurity and other obstetric problems. In my opinion the WHO and BMJ have joined together to present a completely false statistic for the risk associated with El CD, and this has not been picked up or corrected by either the peer review process or the associated editorial.
It is regretable that the false impression given has been widely reported and disseminated, but the true mortality rates - which are well collected and reported for all UK deaths through CMACH are not given the same prominence.
Yours sincerely
Mike Wyldes MA FRCOG
Consultant Obstetrician
Clinical Lead for Labour Wards at Heart of England Foundation Trust
Data from West Midlands Perinatal Institute, CMACH Regional data collector.
Competing interests: Obstetrician in NHS and Private Practice in UK]]there is no absolute consenus amongst doctors about use of C section either. in this this month BMJ