Table 2.

Early embryonic development in vitro. Data are presented as percent ± s.d.

	n	8 h	24 h			48 h			84 h	108 h
		Pronucleus	Death	Block	2-Cell	Death	Block	4-Cell	Blastocyst
R0	1956	91.33 ± 4.14a	1.79 ± 1.51c	1.73 ± 1.34c	97.95 ± 2.52a	8.83 ± 6.64b	3.18 ± 2.60b	94.55 ± 3.32a	26.57 ± 6.44a	82.92 ± 8.19a
R1	4195	50.40 ± 5.19b	4.51 ± 4.89c	8.16 ± 3.87a	91.85 ± 2.99b	28.55 ± 6.39a	6.78 ± 3.85b	80.14 ± 5.37b	12.34 ± 3.49b	51.98 ± 8.16b
R3	4973	66.44 ± 6.15c	12.03 ± 5.70b	4.11 ± 2.77b	91.73 ± 5.17b	27.53 ± 7.93a	14.53 ± 5.66a	77.03 ± 5.13b	5.53 ± 2.03c	44.76 ± 10.46c
R5	2025	42.73 ± 9.45d	21.04 ± 6.74a	8.01 ± 4.35a	85.39 ± 7.56c	11.85 ± 9.71b	11.85 ± 9.71ab	59.06 ± 9.31c	8.68 ± 4.94bc	37.72 ± 10.69d

Different letters mean P value <0.05 between groups. Pronucleus (%) = no. of eggs with pronucleus/total; no. of eggs embryo (%) = no. of embryos/no. of eggs with pronucleus.