Actress Brigitte Nielsen had her daughter at 54. Picture: Instagram

London - Women giving birth in their sixties will soon become much more common as starting a family is being left later than ever, experts have warned.

The world’s largest fertility conference, held this week in America, is now advising professionals on dealing with the rise of so-called "grey mothers" – with celebrities blamed for making late motherhood look easy and risk-free.

But fertility psychologists warn that women using IVF to have babies in their fifties and sixties risk traumatising their young children by dying or becoming ill, as well as the serious medical complications they face by becoming pregnant so late in life. 

There are no figures for women in their sixties, but Britain’s oldest mother, Elizabeth Adeney, gave birth aged 66 in 2009 following IVF treatment in Ukraine. She said: "It’s not physical age that is important – it’s how I feel inside."

Dr Julianne Zweifel and Dr Julia Woodward, clinical psychologists from Wisconsin-Madison and Duke universities, held the training course on older mothers at the annual meeting of the American Society for Reproductive Medicine in Denver.

Dr Zweifel said: "The drive to be a mother is so strong they don’t think about the problems their child will face until after it is born." Dr Woodward added: "Women think, 'I can wait longer because the IVF clinic will solve it.' "

Experts suggest the ‘Janet Jackson effect’ is encouraging the trend – the pop singer was 50 when she had her first child. Actresses Brigitte Nielsen and Rachel Weisz this year had daughters at 54 and 48 respectively.