Judges have ruled that the UK government acted lawfully in blocking Scotland's gender self-ID reforms.
Legislation making it easier for people to change their legally-recognised sex was passed by the Scottish Parliament last year.
The UK government blocked it from becoming law over fears it would impact on equality laws across Great Britain.
The Court of Session in Edinburgh has now rejected a Scottish government legal challenge to the veto.
The Scottish government has 21 days to decide whether it wants to appeal against the ruling, and the case could ultimately end up in the Supreme Court in London.
The legislation received cross-party support in Holyrood, passing by 86 votes to 39 after a highly-charged debate.
Campaigners against the reforms warned the legislation could risk the safety of women and girls in same-sex spaces such as hospital wards and refuges.
https://www.bbc.co.uk/news/uk-scotland-67659791