A 2005 episode of South Park which mocks a transgender woman demanding an abortion despite not being able to get pregnant has gone viral 18 years after it first aired, as trans issues continue to dominate today's politically correct climate. 

The episode is titled Mr. Garrison's Fancy New Vagina. It mocks a transgender woman - Garrison- demanding an abortion, assuming she is pregnant because she hasn't menstruated. 

Garrison is outraged that she can't carry a baby - or abort one - despite having paid $5,000 for gender reassignment surgery. 

The episode also makes brutal commentary on abortions, saying they 'scramble babies' brains'.  

It went viral this week in the context of today's ongoing, angry debate over transgender issues, and while the show - a 90s and early noughties stalwart - gained renewed interest for mocking Prince Harry and Meghan Markle.

Republican commentators including Donald Trump Jr., who said the comedy series 'nails it'. 

The skit is set in a Planned Parenthood. Garrison, a biological man who has had gender reassignment surgery, is called into the doctor's office. 

'Hello doctor, looks like I need an abortion,'  she says.  

'An abortion?' the doctor replies.

'Yeah I've got one growing inside me. Now, are you going to scramble its brains or just vacuum it out?' Garrison asks, in a not-so-subtle rebuke of abortion by the South Park writers. 

The doctor sighs and says: 'Mr. Garrison,' to which she replies: 'Mrs Garrison!' 

The doctor perseveres.

'Mrs. Garrison, you can't have an abortion.' 

'Don't you tell me what I can and can't do with my body! A woman has a right to choose!' she says, leaping out of the doctor's chair and stirrups. 

'No I mean you're physically unable to have an abortion because you can't get pregnant,' the doctor explains.

'But I missed my period,' says a confused Garrison. 

'You can't have periods either. You had a sex change Mr. Garrison, but you don't have ovaries or a womb. You don't produce eggs.' 

A downtrodden Garrison replies: 'You mean, I'll never know what it feels like to have a baby growing inside me and scramble its brains and vacuum it out?' 

The doctor confirms: 'That's right.'  

'But I paid $5,000 to be a woman. This would mean I'm not really a woman. I'm just a guy with a mutilated penis,' says Garrison.

The doctor agrees: 'Basically, yes' to which Garrison replies: 'Oh boy, do I feel like a jacka**.' 

Republicans celebrated the clip on Twitter, saying it 'nukes the trans movement and abortion' in one fell swoop. 

Others pointed to a different 2014 episode in which Cartman sticks a pink bow on  his head and calls himself transgender in order to use the girls' school bathrooms.