freemartin

"Hmm. Now thens. Do you know where His Vastness the Freemartin Muskish is?"

“A heifer born with a twin bull is called a ‘freemartin’ and about 95 percent of the time she is infertile,” she said.

“Most of our girls are freemartins, of course. I’m a freemartin myself.”

“You can indulge in any number of pleasant vices with a freemartin and run no risks of having your eyes put out by your son’s mistress. ‘The wheel has come full circle; I am here.’

Freemartin, frē′mar-tin, n. a cow-calf born as a twin with a bull-calf, usually barren.