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Effect of in utero treatment with busulfan (7.5 mg/kg) on days 98 and 108 on germ cell numbers in male piglets (experiment 2)

	Gonocytes or Spermatogonia/1000 Sertoli Cells (Mean ± SD)
Group	10 days	2 weeks	4 weeks	8 weeks

Treatment	9.9 ± 2.5^*	21.8 ± 7.8^*	9.8 ± 1.3^*	13.8 ± 4.5^*
Control	75.2 ± 13.5	74.3 ± 12.2	51.0 ± 8.1	73.0 ± 15.5

*Significant difference within age group (P < .05).