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Blastocyst Embryonic Development - Anatomy & Physiology (view source)
Revision as of 16:28, 18 January 2011
, 16:28, 18 January 2011→Pre-Implantation Development
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The '''blastocyst''' ''''hatches'''' from the zona pellucida, although the period after fertilisation that this occurs is variable depending on species. '''Blastocyst''' hatching occurs in rodents, dogs, cats and primates 8 days after fertilization whilst in ungulates it is 12 days after fertilization. Once hatched, the '''blastocyst''' is free-floating within the uterus, totally dependent on the uterine environment for survival.
The '''blastocyst''' ''hatches'' from the zona pellucida, although the period after fertilisation that this occurs is variable depending on species. '''Blastocyst''' hatching occurs in rodents, dogs, cats and primates 8 days after fertilization whilst in ungulates it is 12 days after fertilization. Once hatched, the '''blastocyst''' is free-floating within the uterus, totally dependent on the uterine environment for survival.