Prostaglandin F2α (PGF2α) production possibility and its receptors expression in the early- and late-cleaved preimplantation bovine embryos

Table 2 Blastocysts formation rates depending on the time of first cleavage

number of fertilized oocytes, n	fertilization rate, n (%)	early-cleaved embryos (30 hpi), n (%)	late-cleaved embryos (48 hpi), n (%)	blastocyst formation rate, n (%)	blastocysts from early-cleaved embryos at Day 7, n (%)	blastocysts from late-cleaved embryos at Day 7, n (%)
5794	4202	1900	2302	1313	716	600
	(72,5)	(32,8)^a	(39,7)^b	(31,3)	(37,7)^A	(26,1)^B

Proportion of embryos cleaved at 30 and 48 h post insemination (hpi) and formation of blastocysts at Day 7 of in vitro culture depending on the time of the first cleavage. Percent of early- and late-cleaved embryos was presented according to the number of fertilized oocytes. Blastocyst formation rate was calculated according to the total number of cleaved embryos. Percent of early- and late- cleaved blastocysts was presented in relation to the total number of embryos cleaved at 30 and 48 hpi, respectively
^a,b Differences between cleavage rates (P < 0.0001)
^A,B Differences in blastocysts formation rates between early and late cleaved group (P < 0.0001)
P values of cleavage and blastocysts rate determined by Chi-square test with Yates’ correction

ISSN: 1746-6148