A composition for use in the control of ovulation of female bovines.

摘要

A method and composition for increasing ovulation in female cattle wherein the cattle are administered with the composition so as to produce a mean steroid binding antibody titre in the female cane of from 1 in 100 to 1 in 5000 at the time of ovulation. The composition comprises (i) a conjugate of a steroid androgen, such as androstenedione or testosterone, or of a a steroid oestrogen, such as oestrone, and an immunogenic protein, such as human serum albumin, and (ii) acid anhydrides of the steroid derivative, the composition containing from 10 to 90% of the steroid moiety in the form of the anhydrides.