An analysis of thousands of women has found that the older your mother was when you were born, the more likely you are to be childless – but we don’t know why
The older your mother was when you were born, the less likely you are to have children – but we don’t know why. An analysis of thousands of women has found that daughters of older mums are more likely to be childless – an effect that can’t be fully explained by social factors like wealth or education.
So far, there’s been mixed evidence over whether parental age at first birth is linked to lower fertility in children. There does seem to be a trend that women who are wealthier and more educated are more likely to give birth later in life – and wealth tends to be passed down the generations for multiple reasons.
But Olga Basso, of McGill University in Montreal, Canada, is interested in whether there might also be biological factors that make the children of older parents less likely