Katie Zelem's opener was her third in all competitions for Manchester United this season
Manchester United swatted aside Birmingham to move up to third in the Women's Super League.
The hosts scored three goals in six first-half minutes, with Leah Galton setting up the first for Katie Zelem before scoring two herself.
The ball dribbled in off the back of Blues goalkeeper Emily Ramsey shortly before the break to make it four.
Alessia Russo's diving header was the only goal of the second half as United continued to dominate.
United are level on points with second-placed Chelsea, but have played two games more, while leaders Arsenal are four points better off.
Birmingham City claimed their first win of the season in sensational style last weekend, shocking the Gunners in a huge upset.
But they rarely looked like staging a repeat at Leigh Sports Village, with Louise Quinn's venomous effort against the bar just after the hour mark their first shot of any kind.
With the result beyond doubt, United brought Netherlands' international Jackie Groenen off the bench for her first appearance since suffering a hamstring injury in November.
- Line-upsMatch StatsLive Text
Line-upsMan Utd Women
- 27Earps17BatlleSubstituted forThorisdottirat 81'minutes5Mannion21Turner20SmithSubstituted forBlundellat 62'minutes12LaddBooked at 25minsSubstituted forThomasat 63'minutes10Zelem8Risa7Toone23RussoSubstituted forGroenenat 77'minutes11GaltonSubstituted forFusoat 81'minutes
B'ham City Women
- 21Ramsey30Lawley4Quinn3Scott11PennockSubstituted forWhelanat 76'minutes10Murray7SarriSubstituted forRyan-Doyleat 86'minutes25Holloway14Finn12SmithSubstituted forWhippat 45'minutes17QuinnSubstituted forEwensat 75'minutes
Referee:Kirsty DowleAttendance:1,015Match StatsHome TeamMan Utd WomenAway TeamB'ham City WomenPossessionHome71%Away29%ShotsHome15Away1Shots on TargetHome9Away0CornersHome5Away1FoulsHome8Away4Live TextPost update
Match ends, Manchester United Women 5, Birmingham City Women 0.
Second Half ends, Manchester United Women 5, Birmingham City Women 0.
Foul by Martha Thomas (Manchester United Women).
Gemma Lawley (Birmingham City Women) wins a free kick in the attacking half.
Foul by Vilde Risa (Manchester United Women).
Harriet Scott (Birmingham City Women) wins a free kick in the attacking half.
Foul by Jackie Groenen (Manchester United Women).
Christie Murray (Birmingham City Women) wins a free kick in the defensive half.
Offside, Manchester United Women. Vilde Risa tries a through ball, but Ivana Fuso is caught offside.
Substitution, Birmingham City Women. Eleanor Ryan-Doyle replaces Veatriki Sarri.
Substitution, Manchester United Women. Maria Thorisdottir replaces Ona Batlle.
Substitution, Manchester United Women. Ivana Fuso replaces Leah Galton.
Substitution, Manchester United Women. Jackie Groenen replaces Alessia Russo.
Substitution, Birmingham City Women. Emily Whelan replaces Jade Pennock.
Substitution, Birmingham City Women. Sarah Ewens replaces Lucy Quinn.
Goal! Manchester United Women 5, Birmingham City Women 0. Alessia Russo (Manchester United Women) header from very close range to the top left corner. Assisted by Hannah Blundell with a cross.
Hand ball by Aoife Mannion (Manchester United Women).
Attempt blocked. Ella Toone (Manchester United Women) right footed shot from the right side of the box is blocked. Assisted by Martha Thomas.
Substitution, Manchester United Women. Martha Thomas replaces Hayley Ladd.
Substitution, Manchester United Women. Hannah Blundell replaces Kirsty Smith.
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