XY gonadal dysgenesis in a heifer.
The anatomical and histological features of the genital tract of a six-year-old Haryana heifer, which had failed to show oestrus, are described. The heifer had a 60 XY karyotype in the leucocyte culture. The external genital organs were absent and a small opening at the ventral perineal border acted as the external urogenital opening. The ovaries were completely hypoplastic and a uterus didelphys opened into a single cervix. No male sex organs or their rudiment were observed.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000235:genetics* / Q000473:pathology; D005260:Female; D006059:Gonadal Dysgenesis / Q000235:genetics / Q000473:pathology / Q000662:veterinary*; D007621:Karyotyping; D008297:Male; D010053:Ovary / Q000473:pathology; D012730:Sex Chromosomes; D014960:X Chromosome; D014998:Y Chromosome