title: Fertility of ram spermatozoa following pellet freezing on dry ice at -79 and -140 degrees C.
mesh_terms: D000818:Animals; D005260:Female; D005298:Fertility; D005615:Freezing; D007315:Insemination, Artificial; D008297:Male; D011247:Pregnancy; D012756:Sheep; D013094:Spermatozoa