Oocyte rescue in-vitro maturation does not adversely affect chromosome segregation during the first meiotic division.

Research Question: Does rescue in-vitro maturation (IVM) in the presence or absence of cumulus cells, affect the progress of meiosis I, compared with oocytes that mature in vivo?

Design: This prospective study was conducted in a university-affiliated fertility centre. Ninety-five young oocyte donors (mean age 25.57 ± 4.