Open AccessThe use of a detailed zygote score after IVF/ICSI to obtain good quality blastocysts: the German experience
Author(s) -
U. Zöllner
Publication year - 2002
Publication title -
human reproduction
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.446
H-Index - 226
eISSN - 1460-2350
pISSN - 0268-1161
DOI - 10.1093/humrep/17.5.1327
Subject(s) - pronucleus , zygote , blastocyst , andrology , biology , embryo , oocyte , embryo quality , gynecology , embryo transfer , embryogenesis , medicine , genetics
Due to improvements in embryo culture, it is now possible to transfer embryos 5 days after oocyte retrieval and IVF/ICSI at the blastocyst stage, giving a better synchronization with the female reproductive tract. In Germany it is illegal to culture more than three embryos. Therefore, there is need for a sufficient selection at the pronuclear (PN) stage to select the best zygotes and exclude those of poor quality.
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