Fig. 2From: An efficiency comparison of different in vitro fertilization methods: IVF, ICSI, and PICSI for embryo development to the blastocyst stage from vitrified porcine immature oocytesEmbryo production. Morulae (a) and blastocysts derived from vitrified immature porcine oocytes (b–d). Images were obtained with an inverted microscope with 400X magnification. M morulae, TB trophoblast, B blastocyst, BC blastocyst cavity, ICM inner cell massBack to article page