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Should extended blastocyst culture include Day 7?

27 Mar 2018

Abstract excerpt

Extended culture to the blastocyst stage is widely practised, improving embryo selection and promoting single embryo transfer. Selection of useable blastocysts typically occurs on Days 5 and 6 of embryo culture. Embryos not suitable for transfer, biopsy or cryopreservation after Day 6 are routinely discarded. Some embryos develop at a slower rate, however, forming blastocysts on Day 7 of culture. Day 7...

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PMID: 29648640
DOI: 10.1093/humrep/dey091

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