The 38-year-old singer and his wife Chrissy Teigen conceived their nine-month-old daughter Luna through In-Vitro Fertilisation – where eggs are collected and fertilised in a lab – and the ‘All of Me’ hitmaker has urged other couples who are having “fertility issues” to try the procedure for themselves. He said: “There are some who look down on people that have fertility issues and need to use IVF.