A learning disability charity has urged OkCupid to stop asking whether people with low IQs should be allowed to have children.
"Would the world be a better place if people with low IQs were not allowed to reproduce?" is one of hundreds of questions asked by the dating app to connect people with their matches.
But Mencap branded it "inappropriate, offensive, and discriminatory”.
Ciara Lawrence, a Mencap campaigner who has a learning disability, said she was "horrified" at the idea of people thinking the world would be a better place if she didn't have children.
Lawrence has started a petition asking OkCupid CEO Mike Maxim to remove the question immediately.
“As someone with a learning disability who is married and thinking about maybe having children in the future I find this question inappropriate, offensive and discriminatory," she said. "It should not matter who you are when you have children, just that you will love them and do everything you can to raise them in the right way.
“Since I was diagnosed with a learning disability when I was ten I’ve been told: 'you will never', 'you can’t', 'you won’t'. All negative attitudes. It was hard for me to imagine then that I would ever achieve anything I dreamed of in my life. However, now I am married, have a great job working at Mencap, and live an independent and happy life. I am very lucky that I have the right support around me, however, I know how important it is for people with a learning disability to have positive role models in their life, and be encouraged to fulfil our dreams."
A OkCupid spokesperson said: “Our question system is designed to help potential matches understand the interests and values of other users. Questions range from mundane to provocative and they specifically allow you to determine your potential compatibility with someone else and to avoid people whose viewpoints you strongly disagree with.”