Melbourne has enhanced its AFLW finals prospects and severely dented those of GWS with a convincing 39-point away win over the Giants.

The Demons dominated the second and fourth quarters on their way to notching a 8.9 (57) to 2.6 (18) victory at Blacktown in western Sydney

Scores were level at quarter-time but Melbourne kicked seven goals to one over the remainder of the game.

The result moves Melbourne to 3-2 and drops GWS to 1-4.

Forward Tegan Cunningham outscored GWS on her own, kicking 3.2 while midfielders Maddison Gay and Karen Paxman racked up 19 and 18 touches respectively.

Melbourne had more run and were more clinical despite some wayward kicking.

The Demons outscored the home side 2.6 to 0.2 in the second quarter to lead by 16 points at halftime.

The margin remained the same at the end of the third quarter during which each team kicked a goal.

The Demons boosted their percentage by slamming on 4.0 to 0.1 in the final quarter.

Alicia Eva and Alyce Parker each tallied 20 touches for GWS.