Author J.K. Rowling has defended her right to speak out on trans issues without fear of abuse.
In an intensely personal essay, she explained the complex reasons for her interest in the subject, revealing painful details from her past.
The Harry Potter creator has long been a target of criticism by trans activists who take issue with some of her social media posts.
At times, the criticism has involved abusive language and threats of violence.
In the latest of several controversies, a post by Rowling in which she criticised the use of the phrase "people who menstruate" drew some negative responses, including from actor Daniel Radcliffe, who played Potter in a series of films.
54-year-old Rowling explained in detail her research and beliefs on trans issues.
She revealed she was a survivor of domestic abuse and sexual assault, and that the trauma involved informed some of her beliefs on women's rights.
She said she believed most trans people posed zero threat, but gave examples of where she thought demands by trans people were dangerous to women.
[quote box]: She wrote: "When you open the door of bathrooms and changing rooms to any man who believes or feels he's a woman, then you open the door to any and all men who wish to come inside."
Describing some of the abuse she'd received - including being told she was "literally killing people with your hate" - Rowling said many women were terrified by trans activists.