a female bovine with a masculinized brain thatbehaves as would a bull, at least insofar as it will mount normal females

a heifer born twin to bull

Female born twin to a bull calf (approximately 9 out of 10 will not conceive).

A chromosomal female twin calf with ambiguous genitalia due to gonadal chimerism.

A condition in cattle where twins are born, one being male and the other female. This usually results in the female twin being infertile.

A freemartin is a female bovine with a masculinized behavior and non-functioning ovaries. Genetically, the cow is female, but it is sterilized in utero by hormones from a male twin.