Development of steroid-induced lordosis in female guinea pigs: effects of different estradiol and progesterone treatments, clonidine, and early weaning.
Olster DH, Blaustein JD. Development of steroid-induced lordosis in female guinea pigs: effects of different estradiol and progesterone treatments, clonidine, and early weaning. Horm Behav. 1989 Mar; 23(1):118-29.