His first experience of sperm donation came 10 years ago

"Sperm banks are incredibly expensive and I don't think they always have the couple's best interests at heart.

"I feel the reproductive medical companies find situations where people have to pay more and more for a chance to become parents, which is really unfair."

Matt says his clientele break down into: 90% lesbian couples, 5% straight couples and 5% single females and is overwhelmed by people seeking his services.

He said: "Currently, there could be between ten to twenty people carrying the children.

"I have 70 guaranteed conceptions, but I could have up to a third more, it's usually a one-off interaction and you don't always hear anything more from them so I could have many more children.

Caters

Many women have taken up his offer of free help with his donations

"I have a fairly strong success rate of helping people conceive, the majority of the people contact me because they know I'm in high demand, I'm donating to multiple people a week.

"Once I donated to four people in two days and three fell pregnant.

"Often I get contact by as many as 10 people per day, so I try to systematically filter down who I work with.

"I've only met one of the children, I keep things mainly online and feel that me being involved would create a confusion.

"I keep my distance, as I don't want the children to see me as an absentee father, the child's parents are their parents in my eyes."

Matt's recipients must first be put pass his questionnaire.

Matt said: "I care a lot about the well-being of the future children and screen the parents, I don't want to see the offspring in bad situations.

"When screening, I look to see if there has been negativity in their lives, if they have complaints about their relationship, if they're employed, if it looks like they have a healthy, stable home-life and their age."

Matt says his most commonly chosen service is artificial insemination but does also offer natural conceptions providing the individual provides clear STI tests.

He added: "The large reason people go with me is I'm pretty successful in helping people to get pregnant and I have a good manner of professionalism.

"I'm fairly fit, I do cross-fit a couple of times a week, fencing and a lot of swimming, I used to be a lifeguard too.

"I have an advanced degree in business, no health problems or genetic history of heart problems in the family."

Matt, who is a single father-of-two, hopes to have more kids of his own in future and says eventually as he gets older he'll leave his secret sperm donating life behind him.

Matt said: "I'll keeping doing this until I'm 45.

"A lot of couples come back to me for second children, so I figure when I hit that age I'll have to stop accepting new people."