Alcohol & TTC

My husband and I finally decided to TTC and I got off the pill two weeks ago. He however drinks quite a bit especially as of late with everything going on in the world. About on average a handle of vodka every 2-3 days, does anyone know if this puts the baby at risk for birth defects/health issues? I am concerned his drinking will either prevent us from conceiving or our child having birth defects or both.