| http://www.w3.org/ns/prov#value | - Science writer Alison Motluk points out that chemicals used in the freezing process are toxic to embryos, though no one knows how much the eggs absorb; that there have been no systematic follow-up studies either of children born from frozen eggs (fewer than 2000 worldwide) or of success rates, especially for women in their late thirties who are the primary users; and that the procedure is very exp
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