Sperm freezing is a simple, accessible, and affordable option for males who are concerned about decreased fertility. Some men opt to freeze sperm because they face possible sterility due to cancer treatment or surgery. While some men who have planned vasectomies or are set to begin the process of sex reassignment choose sperm storage as a way of keeping their reproductive options open.
Sperm freezing, also known as cryopreservation, has been practiced for many decades. Cryopreserved sperm is frozen in liquid nitrogen at a temperature of -196 °C. The frozen sperm cells are held in a state of suspended animation and all cellular activity is essentially halted until thawing. After thawing, a percent of the sperm revive and return to the pre-freeze state. Many thousands of conceptions have successfully occurred from the use of frozen sperm.
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