My SO and I have been ttc our 2nd for 18m now. I'm 24 and he's 26. I've gone to the Dr and done all the test. Told me everything is good. Could it be him since he's been smoking weed for 7 yrs now non stop. Nothing changed besides him smoking. He never smoke when we had our daughter 9yrs ago but he keeps insisting it not that but my Dr said most likely it is that. What do u guys think?