New research into the hormone kisspeptin, which triggers puberty, shows it has the potential to help infertile women whose periods have stopped due to a hormone imbalance. Trials on fertile and infertile women by scientists at Imperial College London, revealed that injections of kisspeptin raised levels of the hormones crucial for ovulation. The research has been led by Dr Waljit Dhillo, a consultant and senior lecturer in endocrinology. He joins Jane to talk through his findings.