Not sure if the link below will work, but this, from an Australian paediatrician is a really chilling read. Lots of excellent, hard data and an explanation of medical options and stages. Worrying analysis of the implications of Canadian and US legislation.
quadrant.org.au/magazine/2016/12/gender-dysphoria-child-surgical-abuse/
The punctuation makes the first paragraph a clunky read, but it is worth working through.