Any variation that results in the presence of mature oocytes with distended polyploid nuclei. In C. elegans, such oocytes mature and exit diakinesis, but are often not properly ovulated or fertilized.
Animals exhibit defects in any physical or chemical process involved in the dilation of the distal spermatheca which is required for the oocyte exit from the gonad arm.
Animals exhibit variations in any physical or chemical process required for the contraction of a thin continuous tube surrounding the proximal portions of the ovary and covering the maturing oocytes to the near portion of the distal gonad arm, compared to control (Wormatlas).
Variations in the progression of a developing oocyte, from diakinesis to metaphase (meiosis I), in response to a signal compared to control animals. Meiotic maturation is accompanied by nuclear envelope breakdown (germinal vesicle breakdown), cytoskeletal rearrangement and meiotic spindle assembly.