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Molecular Reproduction & Development Volume 81, Issue 1, January 2014 cover image
Publication year - 2014
Publication title -
molecular reproduction and development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.745
H-Index - 105
eISSN - 1098-2795
pISSN - 1040-452X
DOI - 10.1002/mrd.22233
Subject(s) - biology , blastomere , zona pellucida , cleavage (geology) , embryo , insemination , embryogenesis , microbiology and biotechnology , andrology , oocyte , genetics , anatomy , pregnancy , paleontology , fracture (geology) , medicine
Embryonic cleavage timing is correlated with developmental competence and levels of specific maternal transcripts. In cattle, the timing to the first cleavage ranges from 24 to 48 hours after insemination. Orozco‐Lucero et al. (this issue) report on how rapidly cleaving two‐cell bovine embryos, such as the one shown here with a polar body still found between the zona pellucida and blastomeres, are more likely to develop successfully.