The 21-year-old only extended his stay at Fratton Park on Friday, with the new agreement due to keep him with the League One club until January 4 following his November arrival.
But a host of injury problems in attack has forced the hand of Blues boss Lee Clark.
Top scorer Marlon King (knee), Peter Lovenkrands (calf) and Akwasi Asante (hamstring) all missed Saturday's 2-2 draw against Burnley, with Nikola Zigic, who grabbed a late equaliser, the only fit recognised striker available.
- Sports & Recreation
- Akwasi Asante
- Peter Lovenkrands