What Can Be Done About Anorexia After Failed Infertility Treatments?

My 32 year old daughter was diagnosed with anorexia after loosing approximately 25kg in weight during March and April 2021. She now weighs approx 40 kg ( 1,85m tall ). The anorexia was the result of three failed infertility treatments by a qualified gynaecologist. She hasn t pick up any weight since being diagnosed and taking supplements etc doesn t help. Any suggestions please doctor!