Mean number of the relative copies (X ± SE) of Ckb , c-fos and s100g in the rat oviducts on day 1 of cycle or pregnancy following intrabursal treatments with the selective agonists of ESR1, PPT or ESR2, DPN. V: vehicle of drugs, PPT: 67.5 ng/μL, DPN: 67.5 ng/μL. All treatments were given 3 h before autopsy. Each experiment consisted of 4 replicas. Means with different letters are significantly different from each other (P < 0.05), a ≠ b ≠ c ≠ d.