New NHS prescriptions of hormone drugs to under-18s have been stopped after a review found evidence does not support their continued use.
The masculinising or feminising hormones have been available on the NHS for 16 and 17-year-olds diagnosed with gender dysphoria who meet certain criteria – but new referrals have been paused from Monday.
Any teenage patients in that age bracket currently receiving cross-sex hormones can continue to receive treatment, but it must be reviewed individually with clinicians.
The NHS England review found the evidence is too weak to show whether such treatment is beneficial or harmful to children with gender dysphoria.
It is understood the NHS is continuing to look at evidence for masculinising and feminising hormones for adults.
A 90-day consultation on plans to remove the treatment as a routine procedure on the NHS has now begun.
The treatment will be paused throughout this period and while NHS England reviews the expected thousands of responses before making its final decision.
The hormones can cause irreversible changes, such as deepening of the voice when taking testosterone, or breast development when taking oestrogen.
Long-term gender hormone treatment can cause temporary or even permanent infertility, the NHS says.
Read more from Sky News:
Vape shop fire closes railway station
Oil’s biggest one-day rise in six years
In the 2024 Cass Review into children’s gender care, Baroness Hilary Cass recommended “extreme caution” in providing such treatment, as well as a “clear clinical rationale for providing hormones at this stage rather than waiting until an individual reaches 18”.
A clinical trial into the impacts of puberty blockers on children as young as 10, launched in November, was paused last month.
This was before anyone had been recruited – amid concerns over the “unquantified risk” of “long-term biological harms”.
Use of the drugs to delay or prevent puberty was banned for under-18s in 2024.
Professor James Palmer, national medical director for specialised services at NHS England, said: “The NHS has exercised extreme caution when considering starting young people on this treatment – in accordance with the advice from Dr Cass – and as part of this action will now be pausing any new referrals for this treatment for 16 and 17-year-olds.
“The NHS continues to offer specialist support for under-18s managing gender incongruence, including mental health support and referral to specialist children and young people’s gender services where appropriate.”