Development of embryos derived from IVF (<i>in vitro</i> fertilization) of metaphase II (MII) deer mice oocytes obtained by superovulation vs. IVM (<i>in vitro</i> maturation): The total number of animals used n = 23.

a<p>Fertilized oocytes were judged by the appearance of secondary polar body as shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0056158#pone-0056158-g003" target="_blank">Fig. 3A and D</a>.</p>b<p>Percentage of fertilized oocytes.</p>c<p>A total of 15 fertilized oocytes was monitored for the formation of two pronuclei.