'I can't hear the biological clock' says Jo Frost

'Supernanny' Jo Frost is unsure if she will ever have children of her own. The parenting guru, who has worked as a nanny for 17 years, says 'I'm 36 and when I meet somebody and when we decide that we will have children then maybe we will. But maybe we won't have children. I don't feel that urgency that many women have.'

The star of Channel 4's 'Supernanny' has also appeared in a popular US version of the show on the ABC network, written a best-selling book, and this week is releasing a second volume called 'Ask Supernanny: What Every Parent Wants to Know'.

Jo is part of the rising UK trend for women to delay having children, contributing to a controversy dubbed the 'infertility time bomb' by researchers.

Last year, Dr Allan Pacey, of the British Fertility Society, said: 'Nature designed women to have children in probably their late teens and early twenties, and many women are now waiting until they are over 35'.

Experts are suggesting the governement introduce policies such as tax relief and more encouragement during career breaks to help women who want to start a family.

However, a Guardian poll earlier this year suggested women are well aware that fertility declines with age but that they choose to balance financial and work pressures against this. In fact, a majority thought doing well at work and earning money can count for more than bringing up a family and 64% of men and 51% of women said it was more important for women to enjoy themselves than have children.

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