Table 4. Chemical activation of porcine oocytes treated with LB in vitro. Five replicates of this experiment were performed. In brackets, numbers of oocytes or embryos are stated. Within a column, values with different small letters (a, b) are significantly different with P<0.05.

Experimental group	No. of oocytes	% of embryos development
		Cleavage rate	Blastocysts rate
Control	197	80.20 ± 2.83 (158)a	20.89 ± 2.44 (33)a
LB+	72	16.66 ± 4.92 (12)b	8.33 ± 8.25 (1)b
LB-	306	84.32 ± 0.91 (258)a	28.68 ± 1.72 (74)a