Table 1.

Germ-cell stage at the time of ET treatment for cells that were analyzed as spermatocytes or zygotes

Time*	Spermatocyte analysis	Zygote analysis
6 h	Diakinesis
16 h	Diplotene/diakinesis
40 h	Pachytene/diplotene
64 h	Pachytene
6.5 d		Testicular sperm
10 d	Leptotene/zygotene
24.5 d		Pachytene
34.5 d		Preleptotene
41.5 d		A spermatogonia

^*For spermatocyte analysis: time between exposure and sacrifice; for zygote analysis: time between exposure and estimated time of fertilization.