Schistosomiasis (bilharziasis) is a major human disease caused by three species of the genus Schistosoma, known collectively as blood flukes. Africa and western Asia (e.g., Iran, Iraq) are endemic centres for S. haematobium; S. mansoni also is found in these areas, as well as inâ¦
How Alcohol Damages Sperm. Alcohol can reduce the quantity of sperm a man produces (his sperm count) and the quality of that sperm. One way in which alcohol does this is by preventing the body from absorbing zinc in the normal way. Zinc is found in high quantities in sperm.
Thatâs because nicotine has been shown to lower sperm count and quality, squashing your odds of making a baby. Sperm Killer #7: Feeling Stressed. Men, too, can be affected by the stress of trying to have a baby. âFor men, fertility is linked with virility and sexuality,â says Dr. Domar.