When a couple is unable to conceive, infertility issues can stem from either partner, with up to 40% of cases caused by male factors related to sperm quality including low count, poor mobility or abnormal shape. For men, infertility may be due to idiopathic reasons or stem from prior illness, medication, lifestyle habits like smoking and drinking, or varicocele veins. Recommendations to potentially improve sperm count include stress reduction as well as avoiding tight clothing, hot baths, alcohol and smoking.