Women in same-s*x relationships who want pregnancy are being pressured into having s*x with men. Men are offering their services as unauthorized sperm donors for as little as £30 on secret Facebook groups.

A BBC documentary has discovered how men offer their semen on secret Facebook groups, with the women every so often not even knowing their name or other basic details.

Prospective donors offer themselves on social media – offering to donate their sperm for the cost of petrol involved.

Lots of men say their motivation is to help women conceive who cannot do so naturally. However BBC Three’s Desperately Seeking Semen has uncovered how some men offer their semen via artificial insemination, only to then demand unprotected, penetrative s*x when they arrive at the woman’s home.

According to 2 women featured, Chelsea & Sarah, who are in a relationship, heteros*xual men are targeting L*sbians looking to have children in a bid to ‘turn’ them.

25-year-old Chelsea says: “There’s a lot of people on sperm donation sites that’ll decide that they’ll give someone the help with AI.

“AI is artificial insemination, where you do it through a turkey basting mechanism.

“They’ll turn up & they’ll push for NI, which is a natural insemination, so basic s*x.”

Sarah, 23 explains: “A h&ful of them that are on their specially to try & challenge to see if they can turn a lesbian straight.”

“There’s a lot of that, isn’t there. It’ just because ‘you haven’t had it off a proper bloke’.

“And it’s like someone saying, ‘but this gherkin is longer than the other one.’

“I’m still not gonna go for that gherkin, you know what I mean?”

Some women are resorting to the unregulated donation market due to the high costs of IVF.

It can cost women up to £5,000 to go through the process, compared to just £30 a time from some unauthorized men.