Definition:
"Developing oocytes show defects in their entry, progression through or exit from the pachytene stage compared to control animals. Pachytene is a cell cycle process comprising the steps by which a cell progresses through the third stage of prophase I in meiosis, in which crossing over occurs between a chromatid in one partner and another chromatid in the homologous chromosome." [
GO:0000239, WB:
WBPaper00038381, WB:
WBPerson557]