Lund University May 13 2025 About 15 per cent of all couples of reproductive age are involuntarily childless. A major reason why so many need assisted reproduction is that nowadays more and more people are putting off starting a family.  "This is a global trend that is expected to increase in the coming years. In Europe alone, one million IVF treatments are carried out each year; in Sweden, the corresponding number is 25,000," says Yvonne Lundberg Giwercman, professor at Lund University who led