AUSTRALIAN scientists appear to have disproved a theory that a caesarean delivery protects children from cerebral palsy.
Their study of more than 1.5 million births shows no link between the mode of delivery and the number of children born with the condition.
The findings, to be published in the journal Obstetrics & Gynecology, show the risk of cerebral palsy is not lowered by either elective caesarean or emergency caesarean during labour.
"The causes of cerebral palsy must lie elsewhere," said lead author Dr Michael O'Callaghan of the University of Adelaide's Australian collaborative cerebral palsy research group.
"For over a century it was assumed, without good evidence, that most cases of cerebral palsy were due to low oxygen levels or trauma at birth," said the university's Professor Alastair MacLennan, who led the research.
Caesarean rates had increased from five per cent to 33 per cent in Australia and in many other countries of the past 40 years, but cerebral palsy cases remained static at just over two per 1000 births.
He said the findings were important to health professionals. They were also legally significant because it had been argued that early caesarean delivery could prevent the condition.
"We now need to focus our efforts on finding the antenatal causes of cerebral palsy, which may include genetic vulnerability and environmental triggers such as infection."
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