Sexual differentiation of the pig gonad.
D000818:Animals; D005260:Female; D005333:Fetus; D007985:Leydig Cells / Q000648:ultrastructure; D008297:Male; D010053:Ovary / Q000196:embryology* / Q000648:ultrastructure; D011247:Pregnancy; D012733:Sex Differentiation; D013552:Swine; D013737:Testis / Q000196:embryology* / Q000648:ultrastructure