The uncertainty of banking sperm – Science News, February 26, 1972
Many males considering vasectomies have been depositing a amount of their semen with sperm banks the place, for a charge, it’s frozen and saved.… There is vast disagreement on the size of time that sperm could also be frozen after which thawed and used efficiently to impregnate a girl, with estimates starting from solely 16 months to as a lot as 10 years.
Update
The means to freeze sperm has helped make parenthood doable for hundreds of thousands of individuals, together with infertile or same-sex {couples} and individuals who have undergone most cancers remedy (SN: 6/19/21, p. 16). Sperm-freezing strategies have improved for the reason that Nineteen Seventies, and research have proven that frozen sperm can stay viable for a few years, even a long time. The charge of stay births from sperm frozen for as much as 15 years at a sperm financial institution in China was much like charges from sperm saved for a lot shorter durations, scientists reported in 2019. In 2013, U.S. researchers reported the delivery of wholesome twins who have been conceived utilizing sperm that had been frozen for about 40 years.