Kittok R J, Stellflug J N, Lowry S R
J Anim Sci. 1983 Mar;56(3):652-5. doi: 10.2527/jas1983.563652x.
Estrus was induced during March and April in 50 lactating ewes that were 20 to 31 d postpartum. Following estrus induction, ewes were treated with either saline or human chorionic gonadotropin (hCG; 100 IU) on d 11, 12 and 13 after mating. Regardless of whether ewes were later diagnosed as pregnant or not, treatment with hCG increased serum progesterone concentrations compared with concentrations observed in saline-treated ewes on d 12, 14 and 16 after mating (P less than .01). Pregnancy rate was higher in ewes treated with hCG than that of ewes treated with saline (58 vs 29%; P less than 0.5). Data from the present study indicate that it is possible to increase pregnancy rate in lactating, anestrous ewes after artificially-induced estrus by administering hCG.
在产后20至31天的50只泌乳母羊中，于3月和4月诱导发情。发情诱导后，母羊在配种后第11、12和13天接受生理盐水或人绒毛膜促性腺激素（hCG；100国际单位）治疗。无论母羊后来是否被诊断为怀孕，与在配种后第12、14和16天接受生理盐水治疗的母羊相比，hCG治疗均提高了血清孕酮浓度（P小于0.01）。接受hCG治疗的母羊的妊娠率高于接受生理盐水治疗的母羊（58%对29%；P小于0.5）。本研究数据表明，通过施用hCG，有可能提高人工诱导发情后的泌乳、乏情母羊的妊娠率。
