George North will take a month out of playing rugby as he seeks to recover from a series of concussions in recent weeks.
The Wales winger was knocked unconscious last Friday in Northampton's win over Wasps when Nathan Hughes' shin collided with his head.
That followed two blows to the head received in Wales' Six Nations opener against England, with North as a result seeking out medical help for the issue.
North saw a neurologist on Wednesday (April 1st), who has advised that the winger take a month away from playing rugby before being re-assessed at the end of April.
North will continue to be monitored by the Saints' medical team in the intervening period. He will not participate in on-field training, but will continue to contribute in other areas and maintain his work with the club's performance department.
"We have listened to the advice we sought and George will be taking some time away from the field," said Saints director of rugby Jim Mallinder.
"Throughout this process it is important that George's welfare comes first and that he is treated patiently and calmly, only returning to action when all of the medical team are happy for him to do so."
As a result North will miss this weekend's Champions Cup clash with Clermont Auvergne, as well as a potential semi-final, while it seems unlikely he would be able to return even if Northampton made it all the way to the final.