Figure 1. Illustration of PVA-BTCA matrix and rescue in vitro maturation (IVM) of human oocytes study experimental groups. A. PVA-BTCA matrix surface under the microscope (10x magnification); B. Presence of cumulus cells adhered to the matrix; C. Oocyte in germinal vesicle (VG) under the PVA matrix and D. Oocytes matured in the 3D environment (PVA-BTCA matrix) in co-culture with cumulus cells.