Chromosomes in the porcine first polar body possess competence of second meiotic division within enucleated MII stage oocytes.

PLoS One · 2013 · PMC3849472 · PMID 24312673

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a decreasing trendno p-value reported

However, the proportions of oocytes with good quality (Grades 1 or 2) PB1s showed a decreasing trend over time ( Figure 4 ).

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