Hi PJB,

Honestly I don't know much about mens fertility...but what I can tell you is..after being on here a while and thru friends...one of the first things the FS ususally recommend (besides more tests) is for the men to take Menevit.
It is just vitamins - available at the Chemist.
Apparently it often improves some issues.
All the best with the FS but I'd get a start on the Menevit anyway...it certainly can't hurt.

Goodluck..