how much is he drinking? i googles a few articles. i think you may find this one helpful. alcohol in moderation shouldn't cause a problem. excessive alcohol consumption probably will though. although, if you're trying to get pregnant with a man who is drinking in excess often enough to prevent you from being able to get pregnant i would have to question your judgement. i also noticed you said "when i'm trying to get pregnant." seeing as if you do get pregnant, you'll be bringing an entire new little person into the world, a pretty huge commitment, it's very important that the father is involved in the decision. are you BOTH trying for a baby?
Healthy Sperm