Are 13 million women in the UK really menopausal?

We examine a widely circulated claim about the number of women in the UK who are experiencing menopause. What does it actually mean to say that? Presenter Tim Harford and reporter Jo Casserly investigate with the help of Professor Mary Ann Lumsden, CEO of the International Federation of Obstetricians and Gynaecologists.

(Image: Menopause related objects & symbols, Getty Images)