Commercial surgical embryo transfer in cattle

Abstract

Extract

Sir, — Surgical embryo recovery and transfer techniques have been used commercially in cattle, by the authors, for 5 years. This letter describes the results achieved in the 1977–78 season at Wairaki Station in Southland. The work was done in two 6-week periods during November-December 1977 and March-April 1978. The results demonstrate succesful superovulation and embryo collection with repeat donor treatments and operations. The embryo collection rates and pregnancy rates are superior to those achieved by non-surgical methods.