She says she came up with the idea of creating a biological clock after a doctor warned her, "If you really want to do this someday, you should start thinking seriously about it." This led her to question how long she had left to have children, and what she would do if she was unable to.

The device - available for download on Kaddoura's website or iTunes - is based on fertility timeline averages and as such, should not be treated as a medical diagnosis.

Around one in six or seven couples - or around 3.5 million people - may have difficulty conceiving in the UK, according to NHS figures. For every 100 couples trying to conceive naturally, 95 will conceive within two years. Find out more about issues related to fertility here.

What do you think? Is Kaddoura's attempt to confront taboos over fertility with the wonder clock commendable or irresponsible? And would you try out the wonder clock? Let us know on Twitter or in the comments section below.

Biological clock app 'counts down' fertility