Supplements for guys

So hubby and I have been ttc baby #1 for 7yrs. I have pcos and endometriosis and we have been to 2 different fertility clinics. Both told me there is nothing wrong with me other than I'm too fat. (I have lost a lot of weight since then) They also wanted hubby to have semen checked. Unfortunately hubby works with my dad and we have to be there early in the morning for them to check him and they go to work early. My father honestly is an asshole and wouldn't let us get him checked. Wondering what to try for him over the counter?