BELLES slumped to a comprehensive defeat at the DCS Stadium to remain at the foot of the FA Women’s Super League.
Former Doncaster midfielder Rachel Williams broke the deadlock on 17 minutes after a quiet opening to the game.
Kerys Harrop soon doubled her side’s advantage, tapping home Williams’ lay-off.
Lillie Billson went close for the Belles when she shot inches wide of Rebbeca Spencer’s right post.
But Birmingham pretty much wrapped up the points before half time when Jo Potter headed home Karen Carney’s corner to make it 3-0.
Substitute Eniola Aluko rounded Belles keeper Mary Earps to slot home a fourth after the break and seal an easy win for the hosts.
Belles travel to Everton on Sunday still looking for their first point of the new FAWSL season.
Doncaster: Mary Earps, Lyndsey Cunningham, Leandra Little, Jess Sigsworth, Katie Holtham, Aine O’Gorman (Julie-Ann Russell 82), Kasia Lipka, Tanya Oxtoby, Lillie Billson, Naomi Chadwick (Alyssa Lagonia 62), Beth England.
Subs (not used): Lucy Sowerby, Shelby Hills, Millie Bright.