Balanced information based on studies around the world;
The mortality rate for both Caesarian sections and vaginal birth, in the Western world, continues to drop steadily. In 2000, the mortality rate for Caesareans in the United States were 20 per 1,000,000. The UK National Health Service gives the risk of death for the mother as three times that of a vaginal birth. However, it is misleading to directly compare the mortality rates of vaginal and caesarean deliveries. Women with severe medical conditions, or higher-risk pregnancies, often require a Caesarean section which can distort the mortality figures.
A study published in the 13 February 2007 issue of the Canadian Medical Association Journal found that the absolute differences in severe maternal morbidity and mortality was small, but that the additional risk over vaginal delivery should be considered by women contemplating an elective caesarean delivery and by their physicians.
It is difficult to study the effects of caesarean sections because it can be difficult to separate out issues caused by the procedure itself versus issues caused by the conditions that require it. For example, a study published in the February 2007 issue of the journal Obstetrics and Gynecology found that women who had just one previous caesarean section were more likely to have problems with their second birth. Women who delivered their first child by Caesarean delivery had increased risks for malpresentation, placenta previa, antepartum hemorrhage, placenta accreta, prolonged labor, uterine rupture, preterm birth, low birth weight, and stillbirth in their second delivery. However, the authors conclude that some risks may be due to confounding factors related to the indication for the first caesarean, rather than due to the procedure itself.
Risks for the species
Child delivery has always been a great selective pressure for human females, due to the antagonism between bipedalism and the size of newborn's skull. By allowing women to not deliver babies from below, this selective pressure is highly reduced. This might result in an increase of the need for caesareans in future generations. Considering that caesereans have been practiced for several thousand years, the present relative high rate of caesareans can already be considered as the result of this.
Studies have shown that continuity of care with a known carer may significantly decrease the rate of Caesarean delivery but that there is also research that appears to show that there is no significant difference in caesarean rates when comparing midwife continuity care to conventional fragmented care.
The US National Institutes of Health says that rises in rates of caesarean sections are not, in isolation, a cause for concern, but may reflect changing reproductive patterns:
Some authors have proposed an ?ideal rate? of all cesarean deliveries (such as 15 percent) for a population. There is no consistency in this ideal rate, and artificial declarations of an ideal rate should be discouraged. Goals for achieving an optimal cesarean delivery rate should be based on maximizing the best possible maternal and neonatal outcomes, taking into account available medical and health resources and maternal preferences. Thus, optimal cesarean delivery rates will vary over time and across different populations according to individual and societal circumstances.
Nonetheless, some commentators are concerned by the rise and have tried to generate theories to explain it. Louise Silverton, deputy general-secretary of the Royal College of Midwives, says that not only has society?s tolerance for pain and illness been ?significantly reduced?, but also that women are scared of pain and think that if they have a caesarean there will be less, if any, pain. It is the opinion of Silverton and the Royal College of Midwives that ?women have lost their confidence in their ability to give birth."
Silverton's analysis is controversial. Dr Maggie Blott, a consultant obstetrician at University College Hospital, London and then a Royal College of Obstetricians and Gynaecologists (RCOG) spokeswoman on caesareans (and Vice President of the RCOG), responded: 'There isn't any evidence to support Louise Silverton's view that increasingly pain-averse women are pushing up the caesarean rate. There's an undercurrent that caesarean sections are a bad thing, but they can be life-saving