A chimaeric calf with XY/XXY mosaicism and intersexuality

A Friesian calf with an elongated urethra and without a vulva was born twin to a dead bull calf. Red cell chimaerism and XY/XY/XXY lymphocytes were found in the blood, XX/XXY mosaicism was found in the skin and the minute gonads which some showed signs of early testicular development.