A small but growing number of teens and even younger children who think they were born the wrong sex are getting support from parents and from doctors who give them sex-changing treatments, according to reports in the medical journal Pediatrics.

It’s an issue that raises ethical questions, and some experts urge caution in treating children with puberty-blocking drugs and hormones.

An 8-year-old second-grader in Los Angeles is a typical patient. Born a girl, the child announced at 18 months, “I a boy” and has stuck with that belief. The family was shocked but now refers to the child as a boy and is watching for the first signs of puberty to begin treatment, his mother told The Associated Press.