[DDT and the germ cell population of embryonic bird gonads. Treatment of the eggs at different incubation stages].

According to the date of treatment by DDT of chick and quail eggs, the germ population of embryonic gonads is more or less reduced. Administered before incubation, the pesticide provokes a strong decrease in the number of gonocytes: at a later stage (the beginning or the end of germ migration), the DDT does not exert a significant effect. On the other hand, in all the cases, the rate of degenerative germ cells is superior to the control one.