Polar body alterations

The oocytes may present alterations in their polar corpuscle, that is, the small structure located in the perivitelline space that appears after the first phase of oocyte meiosis is completed. Mature oocytes can only have a single polar corpuscle and this must be rounded, a little elongated, and perfectly defined.

Therefore, having a double, fragmented or amorphous polar corpuscle is considered oocyte dysmorphism.