The Effect of Progesterone on the In vitro Maturation and Developmental Competence of Mouse Germinal Vesicle Oocytes

a:4:{s:10:"Background";s:206:"The aim of the present study was to investigate the role of progesterone on the developmental competence of cumulus-oocyte complexes (COCs) and cumulus-denuded oocytes (CDOs) at germinal vesicle (GV) stage.";s:19:"MaterialsAndMethods";s:485:"GV oocytes of pregnant mare's serum gonadotropin (PMSG)-primed prepubertal mice were divided into two groups: CDOs and COCs. The oocytes were cultured in TCM199 with different concentrations of progesterone (10, 38, 50 and 100 μM) and without progesterone (controls). The number of oocytes at the GV, germinal vesicle breakdown (GVBD) and metaphase II (MII) stages were counted. In vitro fertilization (IVF) of MII oocytes and their development to the blastocyst stage were evaluated.";s:7:"Results";s:832:"Significantly different MII rates were observed between the COCs (85%) and CDOs (68%) control groups. The MII rates of 83%, 48%, 14% and 0% for COCs and 65%, 53%, 20% and 0% for CDOs were obtained in TCM199 that contained 10, 38, 50 and 100μM progesterone concentrations, respectively. These MII rates were lower (p