The service costs �2 a month

Cupid's Clock already helps its subscribers to remember anniversaries, birthdays and other important dates.

The site's owners say they are not making any profit from the contraceptive alerts, which cost �2 each month.

Rachael Taplin, who runs Cupid's Clock with her husband John from their home near Solihull, West Midlands, said the fee was "definitely cheaper than forgetting" to take the pill.

My husband John has even suggested we run a parallel PMT reminder service for men Rachael Taplin

"The idea began with the assumption that most men are pretty pathetic at managing their personal lives and needed a little help in remembering anniversaries, birthdays, Valentines day et cetera," said Mrs Taplin.

"However, from there, the site has grown and the pill reminder is an example of this.

"It can be quite confusing taking the pill, but our text alerts can keep you on track and simplify the whole process.

"The alerts are just �2 per month, which is a special not for profit rate, and definitely cheaper than forgetting.

"My husband John has even suggested we run a parallel PMT reminder service for men.

"On a serious note, unwanted pregnancy is a problem and the pill alert is only available to over 16s who have been prescribed it by their GP."

The website, which has been running for about a year, also enables people to follow the progress of celebrities' love lives.