Sunday, February 11, 2024

The unsettled science of trans puberty blockers

This month the Alberta government announced it would restrict the use of puberty blockers to children 16 or over, sparking controversy. Their use on younger children has been controversial in the world scientific community as well. 

They Paused Puberty, but Is There a Cost? | New York Times | Megan Twohey & Christina Jewett:

November 14, 2022- "As the number of adolescents who identify as transgender grows, drugs known as puberty blockers have become the first line of intervention for the youngest ones seeking medical treatment. Their use is typically framed as a safe — and reversible — way to buy time to weigh a medical transition and avoid the anguish of growing into a body that feels wrong.... But as an increasing number of adolescents identify as transgender — in the United States, an estimated 300,000 ages 13 to 17 and an untold number who are younger — concerns are growing among some medical professionals about the consequences of the drugs, a New York Times examination found. The questions are fueling government reviews in Europe, prompting a push for more research and leading some prominent specialists to reconsider at what age to prescribe them and for how long. A small number of doctors won’t recommend them at all.

"Dutch doctors first offered puberty blockers to transgender adolescents three decades ago, typically following up with hormone treatment.... Since then, the practice has spread to other countries, with varying protocols, little documentation of outcomes and no government approval of the drugs for that use, including by the U.S. Food and Drug Administration. But there is emerging evidence of potential harm from using blockers, according to reviews of scientific papers and interviews with more than 50 doctors and academic experts around the world....

"The drugs suppress estrogen and testosterone, hormones that help develop the reproductive system but also affect the bones, the brain and other parts of the body. During puberty, bone mass typically surges, determining a lifetime of bone health. When adolescents are using blockers, bone density growth flatlines, on average, according to an analysis commissioned by The Times of observational studies examining the effects. Many doctors treating trans patients believe they will recover that loss when they go off blockers. But two studies from the analysis that tracked trans patients’ bone strength while using blockers and through the first years of sex hormone treatment found that many do not fully rebound and lag behind their peers. That could lead to heightened risk of debilitating fractures earlier than would be expected from normal aging — in their 50s instead of 60s — and more immediate harm for patients who start treatment with already weak bones, experts say.....

"Many physicians in the United States and elsewhere are prescribing blockers to patients at the first stage of puberty — as early as age 8 — and allowing them to progress to sex hormones as soon as 12 or 13. Starting treatment at young ages, they believe, helps patients become better aligned physically with their gender identity and helps protect their bones. But that could force life-altering choices, other doctors warn, before patients know who they really are. Puberty can help clarify gender, the doctors say — for some adolescents reinforcing their sex at birth, and for others confirming that they are transgender.

“'The most difficult question is whether puberty blockers do indeed provide valuable time for children and young people to consider their options, or whether they effectively "lock in" children and young people to a treatment pathway,' wrote Dr. Hilary Cass, a pediatrician leading an independent review in England of medical treatments of adolescents presenting as transgender. On her recommendation, England’s National Health Service last month proposed restricting use of the drugs for trans youths to research settings [see video]. Sweden and Finland have also placed limits on the treatment, concerned not just with the risk of blockers, but the steep rise in young patients, the psychiatric issues that many exhibit, and the extent to which their mental health should be assessed before treatment.... 

"[I]t’s increasingly clear that the drugs are associated with deficits in bone development. During the teen years, bone density typically surges by about 8 to 12 percent a year. The analysis commissioned by The Times examined seven studies from the Netherlands, Canada and England involving about 500 transgender teens from 1998 through 2021. Researchers observed that while on blockers, the teens did not gain any bone density, on average — and lost significant ground compared to their peers, according to the analysis by Farid Foroutan, an expert on health research methods at McMaster University in Canada....

"Many doctors caring for young trans patients are reassured by the rebounds seen in the children who take blockers for unusually early puberty. In most cases, their bone strength fully recovers after they stop the drugs at about age 11 and resume full puberty, which can last up to five years. But patients identifying as trans take the drugs later, interrupting their normally timed puberty and limiting that crucial period of development....

"So far, only two small studies, published by Dutch doctors, have tracked the bone development of trans patients from beginning blockers through early hormone treatment. In both studies, dozens of patients started blockers at 14 or 15, on average, and began estrogen or testosterone at 16. The participants, followed in one study through age 18, and in the other through age 22, saw their bones strengthen, on average, once on hormones. Still, most patients continued to lag behind their peers; trans men neared average levels, but trans women fell far below."

Read more: https://www.nytimes.com/2022/11/14/health/puberty-blockers-transgender.html

"It Will Be One Of The Biggest Medical Scandals!" Julia Hartley-Brewer On Trans Puberty Blockers Ban | TalkTV | June 12, 2023:

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