Donald Trump is facing renewed calls to quit the presidential race after CNN released audio clips of the Republican nominee calling his daughter Ivanka "voluptuous" and a "piece of ass" during numerous interviews on the Howard Stern Show.

Speaking on-air to the disc jockey in 2004, the business tycoon engaged in a sexual exchange about his daughter, who was then 23 years old.

"By the way, your daughter," Stern said to Trump.

"She's beautiful," the former Apprentice host responded.

"Can I say this? A piece of ass," Stern asked.

"Yeah," Trump replied.

Two years later, the pair returned to the subject of his daughter, with Trump proudly proclaiming his daughter to be "voluptuous."

"She's tall, she's almost 6 feet tall and she's been, she's an amazing beauty," he continued.

The recordings are part of a batch of newly uncovered audio from his appearances on show with the controversial shock-jock over a 17-year period that have deeply misogynistic undertones.

During one exchange Trump describes sex with women on their menstrual cycle.

In another, he infers sexual escapades with the contestants involved in his beauty pageants.

In an April 2005 episode, co-host Robin Quivers questioned whether sex with the girls involved would mark a conflict of interest, to which Trump replied:

Trump's comments on daughter Ivanka, agreeing she is a 'piece of ass'WXRK/CNN

"Well, what you could also say is that, as the owner of the pageant, it's your obligation to do that.

"I'll tell you the funniest is that before a show, I'll go backstage and everyone's getting dressed, and everything else, and you know, no men are anywhere, and I'm allowed to go in because I'm the owner of the pageant and therefore I'm inspecting it," Trump said. "You know, I'm inspecting because I want to make sure that everything is good.

Trump describes his daughter Ivanka as 'voluptuous'WXRK/CNN

"You know, the dresses. 'Is everyone OK?' You know, they're standing there with no clothes. 'Is everybody OK?' And you see these incredible looking women, and so, I sort of get away with things like that. But no, I've been very good."

Trump says that there is 'no age' ón how young a woman has to be for him to consider sleeping with her.WXRK/CNN

When asked by Stern if he had an age limit for his sexual preferences, Trump replied, "No, I have no age – I mean, I have age limit. I don't want to be like Congressman Foley, with, you know, 12-year-olds."

Ex-congressman Mark Foley, resigned in disgrace in 2006 after sending sexually explicit messages to underage teenage boys. But he was pictured sitting in reserved seating granted by Trump's team at a Florida rally earlier this year.

Trump comments on Miss Universe and Miss USA contestantsWXRK/CNN

The news comes just days after Trump's campaign was thrown into turmoil by a leaked Access Hollywood recording revealing the nominee making lewd comments about women to host Billy Bush, unaware his mic was live.

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