Embryo Freezing

The longest time a human embryo has been stored is 25-30 years and, typically, patients that have left embryos in storage for this long are not coming back for them. Some patients have come back after 10-12 years and the embryos have been thawed successfully and created healthy babies. Beyond this time frame, we don’t know how long an embryo will remain viable, but it is possible that, kept in liquid nitrogen, an embryo may be viable indefinitely.