Can alcoholism affect male fertility?

Yes. Alcohol use in men may have negative effects on sperm (decreased semen volume, movement, shape, and count), with inflammation and increased white blood cells in the semen. Alcohol intake is associated with lower levels of fuel (gonadotropins) from the brain and direct effects on the testes leading to lower testosterone. Interestingly, a specific component of red wine, myricetin may affect sperm.