Table 2. Timing of syngamy, 1^st, 2^nd, 3^rd cleavage stages, cavity formation and initiation of hatching for embryos derived from the sperm of normal and obese males.

Developmental event		Normal	Obese	P value
	Cleavage (hours post-fertilisation)
Syngamy		12.63±0.09	12.86±0.07	<0.05
1st cleavage	2-cell	14.35±0.08	14.66±0.07	<0.001
2nd cleavage	3-cell	35.51±0.14	36.35±0.15	<0.0001
	4-cell	36.45±0.16	37.34±0.17	<0.001
3rd cleavage	5-cell	45.99±0.17	46.92±0.19	<0.001
	6-cell	46.60±0.18	47.49±0.19	<0.01
	7-cell	47.33±0.19	48.16±0.20	<0.01
	8-cell	47.96±0.20	48.80±0.23	<0.05
Cavitation		76.47±0.44	77.24±0.43	NS
Hatching		90.88±0.76	91.02±0.85	NS

Data are expressed as mean ± SEM. n = 200 embryos each per paternal group; NS = not significant.