IV. Circumcision & Bodily Autonomy
Circumcision and Urinary Tract Infection: Singh-Grewal et al. (2005), Archives of Disease in Childhood
About 100 circumcisions to prevent one easily treated infection.
Circumcision does lower a baby boy's risk of urinary tract infection. But the baseline risk is about one percent, you would have to circumcise around 100 boys to prevent a single UTI, and UTIs are treated with antibiotics.
Singh-Grewal and colleagues pooled the available studies and confirmed that circumcision reduces the risk of urinary tract infection in boys, cutting it by roughly tenfold in relative terms. Circumcision supporters quote that tenfold figure often. The relative number is real. The absolute one tells the story.
A normal baby boy has a lifetime UTI risk of around one percent. Reducing a one percent risk means you would need to circumcise roughly 100 boys to prevent a single urinary tract infection. The authors put the number needed to treat at about 111 for ordinary-risk infants. To prevent one infection that way, 100 children undergo surgery and a few of them suffer the surgery's own complications.
And a UTI is not a catastrophe. It is found with a urine sample and treated with antibiotics, the same way it is in girls, who get them far more often and are not surgically altered for it.
For the everyday care that supports a baby's skin and bladder, and why coming out of diapers early helps, see the Diaper Free section of this library.
~10x
Relative drop in UTI risk
~1%
A boy's baseline UTI risk
~111
Circumcisions to prevent one UTI
Antibiotics
How a UTI is actually treated
Why it matters
Girls get far more urinary infections than boys, and we treat them with a prescription. Nobody proposes surgery for them, because there is an obvious answer that leaves the child whole.
This is one finding from the research library behind How to Birth a Mother. Everything here traces back to a study, a dataset, or a systematic review.