I haven't tallied overall, but we had nothing but ewe lambs to start - something like 2 tup lambs in 18 lambs. We've a dilemma now, usually the early lambs are finished for the early market, but these ewe lambs are really nice and we would like to keep many of them on for breeders...
I suspect the numbers evened up as we've gone through our lambing - I think I've ringed as many testicles as not...
There's a theory that tups give more ewe lambs early on in their lives, more tup lambs later. I totted them all up one year, across seven tups, and there was a very significant skew in that direction.