A sperm donor claims he could have fathered up to 100 children in four years by offering his services for free on FACEBOOK

Matt Stone, 37, from North Carolina, USA, says he is contacted through Facebook ten times a day by people who are hoping to conceive a baby.

He first donated sperm over ten years ago when he was working at a nearby sperm bank.

It was four years ago when Matt Stone decided to start , advertising his essence to couples and single women.

Once they had passed his vetting process he would ship this donation out the recipient.

The vetting process involves a questionnaire where he quizzes the customers about their background, income and even checks out how their relationships appears online, to be sure that the children will be joining loving homes.

He says that he helps up to eight people a week and estimates that as many as 20 women could currently be pregnant with his children.

He has at least 70 children to date but believes that there could be more than 100 out there as a large number of successful pregnancies aren’t reported back to him.

IT worker Matt said: "With every successful pregnancy it's incredibly rewarding, I've helped couples with fertility issues and those in gay marriages to have the dream they would never otherwise be able to have.

"My sister, who recently turned 43, didn't try to have kids until it was way too late, so she never had any children.

"She thinks what I do is great, in essence I've made up for the fact that she didn't have children.