. 2017 Feb 23;63(2):191–197. doi: 10.1262/jrd.2016-156

Table 2. Meiotic stages of MF- and SF-derived oocytes following in vitro maturation culture for 44 h.

Origin of COCs	No. of oocytes examined	No. (%) of oocytes at the stage of
Origin of COCs	No. of oocytes examined	GV	Pro M-I	M-I	A/T-I	M-II
MF	198	12 (6.1 ± 2.0) ^a	6 (3.0 ± 1.2)	23 (11.6 ± 2.6) ^a	0	157 (79.3 ± 4.0) ^a
SF	195	32 (16.4 ± 2.3) ^b	12 (6.2 ± 1.3)	40 (20.6 ± 3.2) ^b	5 (2.6 ± 1.4)	106 (54.2 ± 3.3) ^b

Data are shown as means ± SEM from five replicated trials. ^a,b Values with different superscripts within columns are significantly different (P < 0.05). MF, middle follicles; SF, small follicles; COCs, cumulus-oocyte complexes; GV, germinal vesicle; Pro M-I, pro-metaphase-I; M-I, metaphase-I; A/T-I, anaphase-I and telophase-I; M-II, metaphase-II.