The Dutchman had to be stretchered off the field against Manchester City on Saturday after injuring himself in the unsuccessful act of diving to save the 25-yard Carlos Tevez strike which won the game.
|PREMIER LEAGUE LATEST
|7/2||Swansea are 7/2 with William Hill to be relegated
Gerhard Tremmel, the 33-year-old German who replaced Vorm at the Etihad, is expected to deputise.
Kate Rees, the club's head physio, said: “Michel has a partial rupture of his adductor muscle. He are looking at six to eight weeks out.’’
The injury means Vorm could miss games against Liverpool, Chelsea, Arsenal, Tottenham and Manchester United.