1’ oocytes
Begins meiosis I during fetal life
Completes meiosis I just prior to ovulation
Meiosis I
Arrested in prOphase 1 for years until Ovulation (1’ oocyte)
Meiosis II
Arrested in METaphase II until fertilization (2’ oocyte)
“An egg MET a sperm”
If fertilization does not occur within 1 day
The 2nd oocyte degenerates