Clinical aspects of sperm bank

The ability to preserve human sperm by cryogenic methods has been developed and successfully applied to reproductive biology. 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.