A cyclic change in the frequency of the degenerating spermatogonia in the rat.
D000818:Animals; D002369:Castration; D002470:Cell Survival; D008297:Male; D010507:Periodicity; D051381:Rats; D011919:Rats, Inbred Strains; D013093:Spermatogonia / Q000166:cytology*; D013094:Spermatozoa / Q000166:cytology*; D013737:Testis / Q000166:cytology*