How long can human embryos stay frozen?

On Oct. 26, a healthy baby girl was born from an embryo that had been frozen for 27 years, a possible record for the longest a human embryo has stayed frozen before being born, according to recent news reports.

Molly Everette Gibson was born from an embryo frozen in 1992 and stored in a cryogenic (ultra-cold) freezer in the Midwest, according to The Washington Post. In 2012, the embryo was packed into a liquid nitrogen shipping container and sent to an embryo adoption facility; in February of this year, the embryo was implanted into now 29-year-old Tina Gibson’s uterus, who was herself only 1 year old when the embryo was frozen. 

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