Problem with sexually intercourse - this can include trouble to keep an errection, pre-mature ejaculation , painfully intercourse
Hormone imbalance - low testosterone and other hormonal problems creates male infertility
Undescended testicles - during fetal development one or both testicles fail to descend from the abdomen into the sac that normallycontains testicles. This is also one of the main reasons of infertility in man. I
Blockage of tubules - that tube which carry sperm can be blocked reason of injury from surgery, cystic fibrosis and many more
Antisperm antibodies (ASA) - ASA production are directed against surface antigen on sperm. Which can interference with sperm motility and transport through the reproductive tract, inhibiting capacitation and acrosomereaction?
Varicocele - it is a condition of swollen testicular veins in the skin within which the scrotum lies. It is main reason of low sperm count resulting low sperm count
Drug, alcohol - lowering testosterone levels, follicle stimulating hormone, and luteinizing hormone, and raising estrogen levels, which reduce sperm count
Meditations including than that effect spermatogenesis such as chemotherapy , phenytoin and nirofurantion