Article
A prospective evaluation of cryopreservation strategies in a two-embryo transfer programme
1 Mar 1997
Abstract excerpt
A total of 364 consecutive patients requesting in-vitro fertilization (IVF) treatment were divided randomly into two groups. In the first group, two embryos in the original IVF cycle were allowed to divide prior to transfer, with any remaining embryos being cryopreserved at the pronucleate (PN) stage. In the second group, all the embryos were allowed to divide to the early cleavage (EC) stage, and the best two...
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