The 'egg timer test' is being sold as a way for women to decide when to have a baby. But experts say it can be misleading

Anneline was told she was barren, headed for early menopause, and should freeze her eggs.  (ABC News: Michael Lloyd)

A so-called egg timer test — which gives an indication of how many eggs a woman has left — told Anneline Padayachee she was sterile at 35.

The test, often used in IVF treatment, measures the level of anti-Müllerian hormone (AMH) in a woman's blood to estimate her ovarian reserve.