i had DF's tested about 5 months ago, not so good results, but at least we knew the problem! just asked gp also get his testosterone tested, it doesnt hurt to rule that out either! he has to abstain for at least 3 days and take the sample down to pathology within an hour so best to ring before hand, thats what we did, it cost us $330 though, i dont know about your situation but medicare didnt cover it unfortunately good luck! also put him on menevit we did and 3 months later a natural pregnancy! oh and premature ejaculation can also cause big problems.