Text message contraception service for Catholics
Catholic women in Poland are signing up for mobile phone text messages warning them not to have sex.
The contraception advice service warns when they are ovulating and sex could be lead to an unwanted pregnancy.
The rhythm method of contraception is popular in Poland, which is 90% Catholic.
Instead of taking the pill or using condoms, women will get text messages telling them when to abstain.
Women signing up for the alerts service input their personal details and mobile phone number on the firm's website, the Polish newspaper Super Express reports.
They enter details about their menstrual cycle and in return they receive three monthly text messages on their mobile phones.
It tells them on which days they are most fertile and to abstain from having sex.
The service can also be used by women to increase their chances of becoming pregnant.