An increasing number of women in Australia and overseas are taking up the opportunity of freezing their eggs to be used later, as a kind of motherhood insurance.

But some doctors are warning that these women, mainly in their thirties, are being misled, and being encouraged to freeze their eggs when there is little chance of success.

One of the world's leading IVF researchers, Lord Professor Robert Winston, says women are being given false hope.

'It's very easy, unfortunately, to prey on the anxieties of people,' Professor Winston says.

'Prey is a sightly emotive word, but it's what, in fact, effectively we may be unconsciously doing in our trade.'

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