Lancaster R.T., Foxcroft, G.R., Boland, M.R, Edwards, S. and Gordon, I., 1985. Fertility of sows treated with exogenous estradiol and/or gonadotropins to control postweaning estrus. Anim. Reprod. Sci., 8:365-373 In the first of two experiments 28 multiparous sows were allocated to one of the following treatments two days after weaning at approximately 35 days postpartum: (1) untreated; (2) i.m....