Motility and Infertility

So, we have had 3 failed IUIs, 1 failed IVF cycle and are feeling defeated. Our fertility clinic has not run any tests on my husband or suggested. We know the issue lies in his sperm (motility and low count), I have had a child (he is 10 from a previous) and my body is very receptive to the medication, so wouldn’t the next step be to run some tests on my husband instead of running into a 2nd IVF cycle? Am I crazy to think we should be exhausting everything here and not continue until we find the root of the problem instead of keep failing?

Made an appointment with a Urologist so we can get more fertility help. I don’t understand why my clinic hasn’t offered this yet? Anyone have any insight to share?