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The success of Caesarean sections since the Second World War has led to a startling 20 per cent increase in obstructed childbirths, according to new research.
Scientists say the tendency since the 1950s and 1960s to opt for a Caesarean has caused babies to evolve bigger heads.
This has then prompted the huge increase in fetopelvic disproportion: when the fetal head is too big – or when the birth canal is too narrow – for natural childbirth.
The obstruction is "strikingly high" and now accounts for up to 6 per cent of all births worldwide.
Caesareans meanwhile account for one in four births across the UK and a third of all births in the US.
“We predict that this weak directional selection has led to a 10 to 20 per cent increase in the rate of fetopelvic disproportion since the regular use of Caesarean sections,” said lead author Dr Philipp Mitteroecker, of the University of Vienna.
The obstruction is "strikingly high" and now accounts for up to 6 per cent of all births worldwide.
Caesareans meanwhile account for one in four births across the UK and a third of all births in the US.
“We predict that this weak directional selection has led to a 10 to 20 per cent increase in the rate of fetopelvic disproportion since the regular use of Caesarean sections,” said lead author Dr Philipp Mitteroecker, of the University of Vienna.
It writes that Caesareans in industrialised countries have minimised the chances of women dying in childbirth, but that the trend of obstructive labours may increase and "induce an evolutionary change".
Factors include women brought up on nutritionally restricted diets tend to be shorter with narrower pelvises. But if they maintain a high protein diet soon before and during childbirth - this may lead to the disproportion.
"Disproportion may further increase. But I don't think that one day every baby needs to be delivered by C-sections. The selection towards larger babies is limited by the mother's metabolic capacity and also attenuated by modern medical treatment.
"Newborns with less weight or prematurely born babies have high survival rates in industrialised countries."
the ****ing answer is already in their findings....
The success of Caesarean sections since the Second World War has led to a startling 20 per cent increase in obstructed childbirths, according to new research.
Scientists say the tendency since the 1950s and 1960s to opt for a Caesarean has caused babies to evolve bigger heads.
This has then prompted the huge increase in fetopelvic disproportion: when the fetal head is too big – or when the birth canal is too narrow – for natural childbirth.
The obstruction is "strikingly high" and now accounts for up to 6 per cent of all births worldwide.
Caesareans meanwhile account for one in four births across the UK and a third of all births in the US.
“We predict that this weak directional selection has led to a 10 to 20 per cent increase in the rate of fetopelvic disproportion since the regular use of Caesarean sections,” said lead author Dr Philipp Mitteroecker, of the University of Vienna.
The obstruction is "strikingly high" and now accounts for up to 6 per cent of all births worldwide.
Caesareans meanwhile account for one in four births across the UK and a third of all births in the US.
“We predict that this weak directional selection has led to a 10 to 20 per cent increase in the rate of fetopelvic disproportion since the regular use of Caesarean sections,” said lead author Dr Philipp Mitteroecker, of the University of Vienna.
It writes that Caesareans in industrialised countries have minimised the chances of women dying in childbirth, but that the trend of obstructive labours may increase and "induce an evolutionary change".
Factors include women brought up on nutritionally restricted diets tend to be shorter with narrower pelvises. But if they maintain a high protein diet soon before and during childbirth - this may lead to the disproportion.
"Disproportion may further increase. But I don't think that one day every baby needs to be delivered by C-sections. The selection towards larger babies is limited by the mother's metabolic capacity and also attenuated by modern medical treatment.
"Newborns with less weight or prematurely born babies have high survival rates in industrialised countries."
the ****ing answer is already in their findings....
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