title: Cytogenetic and reproductive studies of bulls born co-twin with freemartins.
mesh_terms: D000818:Animals; D002417:Cattle; D002678:Chimera; D005260:Female; D005298:Fertility; D005611:Freemartinism / Q000235:genetics*; D007621:Karyotyping; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D008540:Meiosis; D011247:Pregnancy; D012098:Reproduction; D012661:Semen; D013090:Spermatocytes / Q000648:ultrastructure; D013093:Spermatogonia / Q000648:ultrastructure; D013737:Testis / Q000473:pathology; D014427:Twins; D014960:X Chromosome; D014998:Y Chromosome