File:Human oocyte-metaphase II.jpg

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Human Oocyte Morphology

This is a meiosis II metaphase II oocyte, note the absence of an obvious nucleus and the presence of a polar body at the cell periphery. The polar body has pushed the oocyte plasma membrane away from direct contact with the zona pellucida.

Some animal studies suggest that the position of this oocyte plasma membrane/zona pellucida space can determine the eventual site of fertilization.

MII - metaphase II oocyte

Germinal vesicle oocyte
Metaphase I oocyte
Metaphase II oocyte
Day 2
Day 3 - Morula
Day 5 - Blastocyst
Day 5 (label)
Day 5 (colour label)
Human oocyte to blastocyst

Reference

<pubmed>19924284</pubmed>| PMC2773928 | PLoS One

PLoS One. 2009; 4(11): e7844. Published online 2009 November 16. doi: 10.1371/journal.pone.0007844.

Copyright

Zhang et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2773928/figure/pone-0007844-g004

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	15:46, 17 April 2012		400 × 409 (12 KB)	Z8600021 (talk \| contribs)
	12:26, 5 April 2010		320 × 330 (21 KB)	S8600021 (talk \| contribs)	Morphology of human oocyte. MII - metaphase II oocyte Note - Original image has been modified to remove array data, colour and other embryo images. See also File:Human-oocyte_to_blastocyst.jpg Pone.0007844.g004.jpg http://www.ncbi.nlm.nih.gov/pm

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