1. a female calf that is sterile due to being born as a twin with a male calf
Usage: veterinary; agricultural

Examples

• The farmer discovered that the female calf was a freemartin and would not be able to reproduce.
• Freemartins occur in about 90% of mixed-sex twin births in cattle.
• The veterinarian explained that the freemartin condition results from hormonal exposure in the womb.
• Cattle breeders must identify freemartins early to avoid including them in breeding programs.
• The freemartin appeared normal but was infertile due to masculinization during development.