File:Human zygote two pronuclei 01.jpg

Zygote showing different distribution of nucleolar precursor bodies (NPB) in the two pronuclei (2PN) and different PB aligment (Original magnification ×400). Zygote observed after 18-20 hours after insemination.

This figure extract zygote was:

(A) 2PN centralized and juxtaposed, NPBs aligned on the side of the 2PN, longitudinal PB alignment.

(B) 2PN centralized and juxtaposed, NPBs dispersed in the 2PN, perpendicular PB alignment. (C) 2PN centralized and juxtaposed, NPBs non polarized with dispersed or not completely aligned NPBs in the 2PN, longitudinal PB alignment. (D) 2PN centralized and juxtaposed, NPBs aligned on the side of the 2PN, neither longitudinal nor perpendicular PB alignment. Black narrows indicate the PBs. (A) and (B) were examples of zygotes included in Pattern 1 group, while (C) and (D) were examples of zygotes included in Pattern 2 group.

Original File name: Figure 2. 1477-7827-8-77-2-l.jpg

See also: Human zygote two pronuclei 01 | Human zygote two pronuclei 02

<pubmed>20579351</pubmed>| Reprod Biol Endocrinol.

© 2010 Nicoli et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.