Between 1 and 2% of the UK population has OCD (obsessive compulsive disorder), according to charity OCD action. Alys-Mai noticed "something inside me wasn't quite right" when she was 14.

Domestic cats are sterilized via ovariohysterectomy, but this procedure is not feasible for the larger population of free-roaming cats. Here they show that injecting high levels of anti-Müllerian ...