Freezing Morula Stage Rabbit Embryos

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Transcriptomic difference in bovine blastocysts following vitrification and slow freezing at morula stage

Cryopreservation is known for its marked deleterious effects on embryonic health. Bovine compact morulae were vitrified or slow-frozen, and post-warm morulae were cultured to the expanded blastocyst stage. Blastocysts developed from vitrified and slow-frozen morulae were subjected to microarray analysis and compared with blastocysts developed from unfrozen control morulae for differential gene ...

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Biopsy of Human Morula-Stage Embryos: Outcome of 215 IVF/ICSI Cycles with PGS

Preimplantation genetic diagnosis (PGD) is commonly performed on biopsies from 6-8-cell-stage embryos or blastocyst trophectoderm obtained on day 3 or 5, respectively. Day 4 human embryos at the morula stage were successfully biopsied. Biopsy was performed on 709 morulae from 215 ICSI cycles with preimplantation genetic screening (PGS), and 3-7 cells were obtained from each embryo. The most com...

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Glucose metabolism of human morula and blastocyst-stage embryos and its relationship to viability after transfer.

The pregnancy rate and implantation rate following blastocyst transfer in the human have been reported to be high; however, it has remained necessary to transfer 2-3 blastocysts to achieve these rates. Morphological criteria are currently used to select blastocysts for transfer and have some limited correlation with ongoing viability. Glucose metabolism of 189 human morula to blastocyst stage e...

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The neglected morula/compact stage embryo transfer.

BACKGROUND This retrospective study analysed the outcomes of 339 embryo transfers on either day 3 (n = 97) or day 4 (n = 242), and proposed a grading system for morula/compact embryos. METHODS The morula/compact embryo grading was based on: (i) the proportion of blastomeres undergoing the compaction process; (ii) the morphology of the compacted multicellular mass; (iii) the embryo quality on ...

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ژورنال

عنوان ژورنال: Biology of Reproduction

سال: 1976

ISSN: 0006-3363,1529-7268

DOI: 10.1095/biolreprod14.3.256