spermogram and semen parameters, teratozoospermia, normal and abnormal sperm. head defects spermatozoon.

abuse anatomy azoospermia background biology broken cell coiled concept conception damage design dna droplet female fertile fertility fertilization fertilize genetic hairpin harmful harming health human illustration infertility insemination life male medical medicine micro motility oligozoospermia pathology pregnancy reproduction science semen sex short sperm spermatozoa spermatozoon spermicidal tail terminal white