Table 1. Developmental competence, quality and cryosurvival rate of cloned embryos produced using different types of donor cells.

Animal number	Origin of donor cells	Embryos reconstructed (n)	Fused n (%)	Cleaved n (%)	Blastocysts n (%)	Total cell number	Apoptotic index	Blastocysts vitrified (n)	Blastocysts re-expanded after warming n (%)
Mu-5926	Skin	183	183 (100%)a	181 (99.0±0.65)a	86 (46.9±3.9)a	281.7±29.2	5.1±0.9a	27	13 (47.5±5.8)
	Fresh semen	183	183 (100%)a	180 (98.6±1.3)a	88 (48.8±4.4)a	299.3±30.3	5.3±0.8a	33	21 (63.8±2.8)
	Frozen-thawed semen	168	168 (100%)a	159 (94.4±2.0)b	84 (48.7± 4.5)a	278.7±20.3	5.4±0.7a	34	21 (62.1±2.7)
Mu- 4393	Frozen-thawed semen	256	256 (100%)a	237 (92.3±3.0)b	133 (51.4±3.3)a	272.5±68.4	5.7±0.6a	50	29 (55.7±4.9)
Mu-3567	Frozen-thawed semen	245	213 (87.0±0.9)b	182 (92.5±1.0)b	68 (34.3±3.0)b	223.0±38.2	20.1±4.2b	20	10 (51.5±15.1)

Data from 12 trials, Values with different letters within the same column differ significantly (P<0.05).