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

Table 1. Meiotic stages of MF- and SF-derived oocytes at 20 h after the start of maturation in vitro.

Origin of COCs	No. of oocytes examined	No. (%) of oocytes at the stage of
Origin of COCs	No. of oocytes examined	GV-0	GV-I	GV-II	GV-III	GV-IV	Pro M-I	M-I
MF	111	10 (8.8 ± 1.9) ^a	5 (4.6 ± 1.1)	65 (58.7 ± 1.9) ^a	13 (11.8 ± 0.9)	15 (13.2 ± 2.4)	1 (1.0 ± 1.0)	2 (1.8 ± 0.9)
SF	111	26 (23.4 ± 5.0) ^b	1 (0.9 ± 0.9)	49 (44.1 ± 2.6) ^b	16 (14.4 ± 0.7)	16 (14.4 ± 5.0)	3 (2.8 ± 1.6)	0

Data are shown as means ± SEM from three 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.