Fertility on ice: does freezing your eggs work as a biological clock 'insurance policy'?

A growing number of single women are turning to egg freezing as an insurance policy. To boost their chances of conceiving it's important to undergo the process when their ovarian reserve is still high, advise medics 

Melted ice cubes close up isolated on white background

One of the most frustrating facts of life is that women's fertility levels decline with age. We are born with a certain number of eggs that deplete over time, taking a nosedive in quantity and quality from our mid-30s onwards.

While the likes of Rod Stewart and Josh Brolin prove that men's sperm remains fertile well beyond the age of 50, the same is not true of women.