Rate of superovulation and embryo production in cows treated with pituitary gonadotropin containing definite FSH LH formulae

The rate of superovulation and embryo production in 120 beef and 177 Black-WhitexHolstein-Fresian (BWxHF) cows treated with a new generation of FSH preparations – Stimufol (Rhone Merieux) and Ovagen (ICP) were compared with those treated with frequently used FSH-P. BWxHF cows treated with Stimufol and Ovagen revealed a significantly higher (P<0.05) number of embryos suitable for a transfer than those treated with FSH-P. In contrast to FSH-P., Stimufol failed to increase the rate of embryo production in Aberdeen-Angus and Limousine cows.