Cow-calf producers should record multiple births in their herds
By Donald Stotts STILLWATER, Okla. – Cow-calf producers need to keep recordkeeping and genetic drift in mind when cattle births result in twins that are a heifer calf and a bull calf. “This condition – called freemartinism – causes infertility in most of the female cattle born twin to a male,” said Dana Zook, Oklahoma State University Extension area livestock specialist for northwestern Oklahoma. “Freemartinism is recognized as one of the most severe…