There haven't been any tests done on clomid in b/milk (as far as I know) so it's just a standard warning on the pamphlet.

Just spoke to DH about what we did this time. It was two rounds of clomid. The first round was badly timed as we both had the flu and subsequent fevers which would have fried any of DH's sperm so chances are it would have worked first time if we weren't sick.