By Neel Shah, The Conversation
There is a good chance that your grandparents were born at home. I am going to go ahead and assume they turned out fine, or at least fine enough, since you were eventually born too and are now reading this.
But since the late 1960s, very few babies in the United Kingdom or the United States have been born outside of hospitals. As a result, you may find the new guidelines from the National Institutes for Health and Care Excellence (NICE) just as surprising as I did. For many healthy women, the NICE guidelines authors believe, there may be significant benefits to going back to the way things were.
Shortly after the NICE guidelines were issued, the New England Journal of Medicine invited me to write a response. The idea that any pregnant patient might be safer giving birth outside the hospital seemed heretical, at least to an American obstetrician like me. Knowing that no study or guideline is foolproof, I began my task by looking for holes to form a rebuttal.
I soon realised that this rebuttal largely hinged on flaws in the American system, not the British one. While Americans take excellent care of sick patients, they do less well for healthy patients with routine pregnancies – largely in the form of turning to medical interventions more than strictly necessary.
As the guidelines suggest, some women in the UK with low-risk pregnancies may be better off staying out of the hospital. Why? Because the significant risks of over-intervention in hospitals, such as unnecessary caesareans, may be far more likely (and therefore more dangerous) for patients than the risks of under-intervention at home or in birth centers. But women in the UK have access to greater range of settings where they can give birth. For women in much of the US, the choice is often the hospital or nothing.
Are hospitals always the best option? The view from the UK
The British Birthplace Study, upon which the NICE guidelines are based, reviewed 64,000 low-risk births to compare the relative safety of giving birth in one of four settings: a hospital obstetric unit led by physicians, an “alongside” midwifery-led birth centre (on the same site as a hospital obstetric unit), a freestanding midwifery-led birth centre, and at home. The study included only women with low-risk pregnancies. Women with obesity, diabetes, hypertension or other medical conditions were excluded from the study.
For low-risk women who had never given birth before, home birth led to bad outcomes (such as encephalopathy or stillbirth) slightly less than 1% of the time. That’s rare, but still twice as risky as the other options. Birth centres were no riskier than hospitals for first-time mothers, and all options (including home) appeared equally safe for women who had given birth before.
By contrast, this same group of low-risk women was between four and eight times more likely to get a caesarean if they started off getting their care in the hospital compared to other settings. Rather than being driven by patient risk or preference, this tendency toward caesarean appeared to be driven by proximity to the operating room.
While the NICE guidelines make it clear that women should be free to choose the birth setting they are most comfortable with, they point out that the risks of over-intervention in the hospital may outweigh the risks of under-intervention at a birth centre or at home for the majority of expecting mothers.
The situation is different for women in the US. Last year 90% of births were attended by physicians, while just 9% were attended by midwives. Fewer than 1% of US women have their babies at birth centres. While access to care is guaranteed here in the UK, nearly half of US counties have no midwife, obstetrician or other maternity care professional.
Caesarean are routine, but not without complications
Today, newborn babies in the US have a one-in-three chance of entering the world through an abdominal incision. In the UK, the odds are lower – more like one in four, but everyone on both sides of the Atlantic agrees this still represents too much help.
Part of the challenge may be a feature of the species. Homo sapiens have always required some form of extra help being born. Narrow pelvises are required for walking upright, and large frontal lobes are required for nuanced thought. Neither works in our favour when it comes to navigating the birth canal. The unresolved question is how much help is truly necessary – and how much help is too much.
Cesareans are designed to be a lifesaving surgery, but they are now so routine that caesareans have become the most common major surgery performed on human beings, period. It hasn’t been until recently that we started to fully consider the downsides of cesarean deliveries.
For starters, caring for a newborn while dealing with a 12-centimetre skin incision in your own abdomen is the pits, especially when compared to caring for a newborn without having a 12-centimetre skin incision.
Though common, let’s not forget that caesareans are a major abdominal surgery that can lead to threefold higher rates of serious complications for mothers compared to vaginal delivery (2.7% vs 0.9%). These complications can include severe infection, organ injury and haemorrhage.
I should also point out that the first caesarean a woman has is an easy surgery – I can train an intern to do one safely in just a few weeks. But most women have more than one child, and most women who have a caesarean the first time will have a caesarean the next time. Obstetricians are among a small group of surgeons who regularly operate on the same part of the same patient over and over again, dissecting thicker layers of old scar tissue with each surgery.
By the second, third, or fourth caesarean on the same patient, the anatomy becomes distorted and the surgery becomes increasingly technical. I recently did a cesarean where the woman’s abdominal muscles, bladder and uterus were fused together like a melted box of crayons.
In the most dreaded cases, a woman’s placenta (a large bag of blood vessels that nourishes the foetus) can get stuck in this mess of tissue and fail to detach normally. In these cases, pints of blood may be lost within minutes, and the only way to stop the bleeding is often to do a hysterectomy.
Why do hospitals mean more interventions? It comes down to risk perception
Since 1970, the number of caesareans performed in the US has gone up by 500%. Some of this increase is because mothers have become older and less healthy, conferring greater risks in pregnancy. But having a baby in this decade is not 500% riskier than having a baby in the 1970s. We know this because caesarean rates in just the women who are young and perfectly healthy have gone up just as quickly. And contrary to popular belief, this has little to do with maternal preferences. First-time mothers who request caesareans with no medical reason make up fewer than 1% of the total.
What’s driving the increase in caesareans in the US is unclear, but much of the drive to do more comes from our perception of risk. Although my professional contribution to childbirth is often just to catch, my responsibility as a scalpel-trained, general obstetrician in the United States is to mitigate risk.
I am acutely aware that even women with healthy pregnancies can develop life-threatening haemorrhage, foetal distress or other unanticipated emergencies during labour that require surgical intervention.
My job is to get the baby delivered before it is too late, and often I’m working with ambiguous information. I know how long labour should take on average, but don’t have a precise estimate of how long labour should take for the patient in front of me. What if the baby is too big or the pelvis is too narrow? Caesareans often come down to a game-time decision.
Fortunately, I can make sure this decision is never wrong. If the baby looks a little blue and lackluster right after I do a caesarean, I’m convinced I did it just in time. But if the baby is pink and vigorous after I do a caesarean, I’m still convinced I did it just in time. Without evidence to the contrary, it is easy for me and many of my colleagues to believe that operating is always the right course of action.
When it comes to the safety of mothers and newborns, most would agree that it is better to overshoot than undershoot. The problem is that we are overshooting by a lot, in ways that lead to more insidious harm. Nearly half of the caesareans we do in the US currently appear to be unnecessary, and come at a cost of 20,000 avoidable surgical complications and US$5 billion (£3.27 billion) of budget-busting spending in the US annually.
Caesareans may have consequences for babies as well, in ways that we are just beginning to understand. Exposure to normal bacteria in the birth canal may play a role in the development of a baby’s immune system. A Danish study of two million children born at full term found that those born by cesarean were significantly more likely to develop chronic immune disorders. Others have suggested that going from the womb to an artificial warmer can have an impact on immediate bonding, and even success with breastfeeding.
In parts of the world where women do not have access to skilled birth attendants, large numbers of mothers and babies die from preventable causes. Even for the healthiest among us, walking into the woods to have your baby would be unwise. Still, much of the developed world offers only one pragmatic alternative: the hospital. For more than a half-century, we have believed that spending many hours, if not days, in a hospital bed with a smattering of ultrasound gel, clips, wires, heart tones, random beeps and routine alarms is the safest way to have a baby.
Many of the patients I care for benefit from my surgical training. I get to save lives while also sharing in one of the most profoundly joyous moments that families experience. But obstetricians like me may be hardwired to operate, and too many operations are harmful to patients. One strategy to fix this might be to change our wiring. Another may be the British way: for patients to stay away from obstetricians altogether – at least until you need one.
Image by Nana B Agyei under Creative Commons license.