Duration: 40 minutes
Women old enough to be grandmothers are having babies. Fifty-nine-year-old Essex mum Susan Tollefsen has a one year old; can she fit in another baby before her 60th birthday?
At 63, Lauren Cohen is a working mum with three children, all under five.
Both Susan and Lauren represent a growing number of women around the world defying nature. With no legal age limits on IVF treatment and biological boundaries being pushed ever further, how do we decide what age is just too old to be a new mum?
This programme was part of Being Mum, a short season of documentaries which explored some of the extreme and occasionally controversial challenges facing parents today.
Find out what was shown during the Being Mum season
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