. 2008 Dec 1;6:58. doi: 10.1186/1477-7827-6-58

Table 1.

Rates of pronuclei formation and development to morula and blastocysts of IVM, MII and aged oocytes following IVF.

	IVM	Ovulated	13 hr Aged
No. oocytes inseminated	115	151	173
No. oocytes with 2 PN/inseminated	94 (82%)^{a, b}	142 (94%)^a	169 (98%)^b
2 cell embryos/inseminated	89 (77%)^c	135 (89%)^{c, a}	129 (75%)^a
4 cell embryos/inseminated	61 (53%)^a	126 (83%)^{a, b}	98 (57%)^b
8 cell embryos/inseminated	55 (48%)^a	119 (79%)^{a, b}	83 (48%)^b
No. blastocysts/inseminated	44 (38%)^a	114 (75%)^{a, b}	82 (47%)^b

Similar letters indicate statistical differences between groups of the same developmental stage

^{a, b}p < 0.001; ^cp < 0.01