some of the advantages include 1 ) availability of sperm for heterologous ( donor ) insemination , 2 ) accumulation of multiple oligospermic specimens for homologous ( husband ) insemination , 3 ) preservation of sperm prior to vasectomy , 4 ) collection and preservation of sperm from men who face permanent injury to spermatogenesis through an operation , chemotherapy or radiation , 5 ) to obviate the potential genetic danger of man 's exposure to environmental pollutants such as radiation and 6 ) availability of husband 's sperm at ovulation time .
C0037868
sperm
C0037864
spermatogenesis