Gonadotrophin ovulation induction is a successful treatment for World Health Organisation Group II anovulatory subfertility in women aged up to 40 and with body mass index up to 34.

Gonadotrophin-induced ovulation (GnOI) is generally an effective treatment when anti-estrogen therapy is unsuccessful. It remains uncertain how appropriate it is in older and obese women. We carried out an analysis of a GnOI programme between 2000 and 2008, including 514 treatment cycles in 140 women with World Health Organisation Group II anovulation.