![](http://www.alamy.com/thumbs/6/C65B89AA-52E5-4E04-9E67-A41F34E85770/CRP91A.jpg)
Fertilised embryos are stored in liquid nitrogen filled tanks to keep them 'as new' if patients require them at a later date.
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Photo credit: © Medicshots / Alamy / Afripics
License: Licensed
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Keywords: clinic, doctor, embryo, fertility, ivf, liquid, ln, ln2, nitrogen, sample, storage