Sean Dougall who was helped off with a knee injury after 25 minutes in Munster's victory over Cardiff Blues at the weekend has been ruled out of action until mid-December.
It was confirmed after an initial scan that Dougall suffered a grade 3 ligament sprain in his knee and he will undergo further examination next week when he meets with the specialist.
Munster have announced that Ronan O'Gara has retired from playing professional rugby. It's understood that the 36 year old will take up a coaching role abroad at the start of the 2013/14 season.
The Munster squad are in to the final weeks of their season with training continuing as players wait on news of possible Ireland and Emerging Ireland tour inclusions.