IVF study finds success rate a third lower in men over 51 than under 35

Expert who led study of 5,000 IVF cycles at London clinic busts myth that male fertility lasts for ever

IVF success rates decline significantly in older men, according to scientists who call for greater awareness of the male biological clock.

The analysis of nearly 5,000 IVF cycles performed at a London fertility clinic found that success rates were about one third lower in men aged over 51 compared with men under 35.