The freestyle skier, who won the Olympic title at Vancouver 2010, has not competed at an event since the Sochi 2014 Olympics.

If she appears in South Korea, the 34-year-old will become the first Australian woman to appear at five editions of the Winter Games.

She has resumed training in Ruka in Finland with the Australian team also featuring 2015 world champion Laura Peel, who is returning from ankle surgery, and Danielle Scott, who won two International Ski Federation World Cup silver medals last season.

"I contemplated coming back in April and May," said Lassila, now a mother-of-two.

"I was hoping that retirement feeling would come - but it kind of never did.

"I even thought ‘oh my God, when is this feeling going to come' but it was also exciting that I had the drive to keep going."

Lassila is the first female aerials skier to ever pull off the quad twisting triple manouvere, while she also won an Olympic bronze medal in Sochi.

A documentary film entitled The Will To Fly tells her story.

"I’m realistic, the goals have changed," she said. 

"When you’ve won a gold, where do your goals go? 

"Vancouver was about the gold. 

"Sochi was about the quad triple.

"I can be competitive for another round - opt for more consistency and be more strategic.

"I know I’m on the tail end of my athletic career and with a second son, life is full and busy.

"I’m realistic and have different expectations this time. 

"I’d regret it if I didn’t try again."

Australia can send four athletes to Pyeongchang 2018, shared between the men's and women's events.

"For Lydia’s first on-snow session we said we just wanted to get her upside-down again with a single back lay out and have some fun," said coach Jeff Bean.

"Her eyes lit up like a kid at Christmas."

This year's FIS Aerials World Cup season begins on December 17 at Beida Lake in China.