Table 5.

Effect of ET treatment of male germ cells on fertilization rate and zygotic development

Dose, mg/kg	Days post ET	No. eggs	Fertilized eggs*		First-cleavage metaphases†
			No.	%	No.	%
0		698	568	81.4  ± 2.1	459	80.8  ± 4.9
80	6.5	627	522	83.3  ± 3.9	451	86.4  ± 9.7
80	24.5	835	630	75.4  ± 2.0‡	486	77.1  ± 8.2
80	34.5	318	242	76.1  ± 3.2	201	83.1  ± 8.0
80	41.5	321	233	72.6  ± 12.8	188	80.7  ± 9.4

Results are presented ± SE. 

^*Fertilization rate, indicator of prefertilization toxicity. 

^† Zygotic development (first-cleavage metaphases/fertilized eggs), indicator of postfertilization toxicity. 

^‡ P < 0.01 vs. controls (χ²).