I read with interest the messages regarding twins. I recently purchased a beautiful longhorn heifer @ 6 months old. I have recently discovered that she is a twin and that the other calf was a bull calf that died at 3 months of age. My husband states that for some reason twin calves are always infertile. What is the rationale behind this phenomenon? I would like to know the pathophysiology if anyone knows. Am horribly disappointed as I had intended to incorporate this calf into the cow herd in the future and now will only be able to use her for roping/sorting events for a year or two. Oh well, lessons learned! Thanks to all for your help!