The 17-year-old from Calgary tore ligaments in her left knee in August while training in Courchevel, France and had surgery to repair the damage late last month.
"After learning that I tore my ACL and had two meniscal tears I was very disappointed and overwhelmed," Pretorius said in a release. "Fortunately, my surgeon Dr. Mark Heard informed me that I could be back jumping in three months by repairing the ACL with synthetic material as well as human tissue from a tissue bank."
Ski Jumping Canada high performance director Curtis Lyon said Pretorius's initial response to the rehab process is encouraging and that they hope to have her back on snow by December.
"Alexandra is and will remain a major piece of Sochi plan and we are confident she can compete and at a high level," Lyon said.
Pretorius, who took up the sport at eight years old, finished 26th overall in the World Cup standings for the 2012-13 season. While she's not considered a medal favourite, Pretorius has shown with results on the World Cup circuit that she does have the potential to land on the podium.