The stories, which are believed to have originated at the National Enquirer in the United States, had suggested that Pistorius, known as the Blade Runner, had been concerned that his girlfriend had been cheating on him with one of his close friends.
This, they continued, was the reason that the pair had been fighting on the night of Steenkamp’s death – and when she informed Pistorius that she was in fact carrying his child, it sent the 26-year-old ‘over the edge’.
The rumours have been picked up and published in several newspapers and gossip sites across the world, with the front page of Wednesday's Daily Star reporting the news in Britain, but the Steenkamp family spokesman has flatly denied the reports.
“The post mortem would have revealed if Reeva was pregnant and it did not reveal anything like this. Maybe it comes from the other side, to garner and build up some sort of support for Oscar,” Mike Steenkamp said.
He added that had it been the case, Reeva’s mother June would have been the first to know.
Pistorius has been granted bail after a hearing last week, but will still face the charge of premeditated murder at a full trial scheduled for June.
He denies the murder, maintaining that Steenkamp’s death was a tragic accident after he mistook her for an intruder.