London: A new technique could be a boon for men with low sperm counts, cancer, or HIV, helping them father healthy kids. Fast-freezing of sperm, known as vitrification, as against the slow-freezing method currently in use, helps sperm retains high levels of activity, say experts. Current techniques mean the sperm only retains 30 to 40 percent of activity. But quick freezing nearly doubles the activity, reports the Daily Mail.
Vitrification is already used to quick-freeze eggs and embryos with success, allowing spare ones to be used in IVF at a later date. IVF or in vitro fertilisation is a process by which egg cells are fertilised by sperm outside the womb. Following thawing, more eggs and embryos survive with vitrification than with older, slower cooling techniques. IANS
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