Research Description Transrectal ultrasonography is a principle research tool.
Transvaginal ultrasonography is used to manipulate the ovarian follicular populations.
Hormonal assays are done to assess the gonadotropins and ovarian steroids and their roles in reproductive events. Selected Publications Ginther, O.J., et al. 1996. Selection of the dominant follicle in cattle. Ginther, O.J. 1993. Griffin, P.G. and O.J. Ginther.