Trifolium pratense (red clover) exhibits estrogenic effects in vivo in ovariectomized Sprague-Dawley rats - Burdette, J E; Liu, J; Lantvit, D; Lim, E; Booth, N; Bhat, K P; Hedayat, S; Van Breemen, R B; Constantinou, A I; Pezzuto, J M; Farnsworth, N R; Bolton, J L (J Nutr, 2002)