Rodman, who dated the LIKE A VIRGIN singer in 1994, was gambling in a Sin City casino when he received a desperate phonecall from his ovulating girlfriend.
He writes in his autobiography I SHOULD BE DEAD BY NOW, "Madonna wanted to have my babies... One time I was in Las Vegas at the craps table doing my thing when I got this frantic call.
"It was like the 'somebody died call' from New York. I picked up the phone and Madonna was like, 'I'm ovulating, I'm ovulating. Get your ass up here.'
"So I left my chips on the table, flew five hours to New York and did my thing. We got done and she was standing on her head in an attempt to promote conception - just like any girl trying to get pregnant.
"I flew back to Las Vegas and picked up my game where I left off."
Despite their efforts, Madonna and Rodman never had a child and split after only a few months together. Madonna gave birth to her first child - daughter LOURDES - in 1996 following a fling with personal trainer Carlos Leon.