What you fail to take into account is the pink haired lesbian man haters dragging kids into alleyways and stopping them from having puberty. This is a totally real thing. A child can't even walk to school without being accosted by pink haired lesbian man haters armed with syringes and a copy of a Dworkin book.

Or probably more accurately if you look at right wing scandals, people that think similarly to them but are brave enough to live their truth and not try to hide behind a bible and pay their reality away.

Conservatives are cowards. They mainline fear 24/7, they feel list without it.

40 years of Hollyweird / Music Industry / Olympics trainer agents pumping their youngest stars full of this shit in order to squeeze an extra year or two of revenue out of them? Fine. Cool. Good. No problems detected.

Some trans youth have a legitimate medical need for deferring puberty, while they come to terms with their gender and sexuality? Fuck you. Prohibited. Go directly to jail.

They're going to have to pull an Alabama and do some matching legal and mental gymnastics.

GnRH was discovered in 1971, and has been available since the '80s. We have a pretty good idea of their long term effects. There could be more about effects on transgender youth in particular, but everything done so far shows it's safe.

blocking puberty has some crazy side effects.

I'm a provider at a children's hospital. I specialize in orthopedics and rehabilitation, so I mostly deal with the musculoskeletal system. I have colleagues who would be able to provide a much better and more in depth explanation, but I will do my best.

Even in orthopedics "hormone blockers" are used fairly frequently. For example the same drugs that people use to transition are utilized to moderate the epiphyseal fusion of growth plates. Puberty is also frequently delayed to moderate the hormone levels of juvenile cancer patients. Or even more increasingly common, to halt the symptoms of precocious puberty in young women.

The vast majority of juveniles prescribed hormones to delay puberty are for non gender affirming care like cancer. The problem with moderating what medical providers can and can't treat is that you are assuming you know more about medicine than the a person who went to medical school.

You may be trying to protect kids, but what ends up happening is an interference of medical care, and usually not the type you intended. If hormone drugs become more monitored, providers may be hesitant, or have a more difficult brine prescribing it.

The dangers of delaying puberty are very small, when you stop the prescription puberty begins again. Usually the only side effect is excessive growth due to a delay if epiphyseal fusion. In regards to gender affirming care, I will remind people that their providers are looking at total outcomes. Meaning they are factoring in things like the higher potentiality of self harm and suicide.

Precocious puberty has been a thing forever and the first medications for delaying it by regulating hormones have been around since the 1980s. I think that should be the jumping off point for research. However afaik the same sorts of drugs are also commonly used to treat cancer in adults.

Here is an article about their use in treating trans people with links to various studies https://transfemscience.org/articles/puberty-blockers/

How long has this medical technology been in use and where can I find studies about it?

Decades. It was there when I was a kid, so like 20 years ago. And it wasn't new medical technology at the time.

I have to imagine that blocking puberty has some crazy side effects.

Sort of the joke. Puberty is what has the crazy side effects.

It reduces bone density. Not to unhealthy levels in teens, but there are concerns the lower baseline will increase osteoporosis risk when the patients get to old age.

They can also only be used for a couple of years. Some non-binary people want to be on them permanently, but doctors won't prescribe that. Some kids want more time to decide, and unfortunately there isn't anything safe to use through the full teenage years.