Oocyte/zygote/embryo Maturation Arrest 2, also known as oocyte maturation defect 2, is related to female infertility due to oocyte meiotic arrest and infertility. An important gene associated with Oocyte/zygote/embryo Maturation Arrest 2 is TUBB8 (Tubulin Beta 8 Class VIII). Affiliated tissues include ovary, and related phenotypes are oocyte arrest at metaphase i and female infertility