The effect of different eCG concentrations on the efficiency of superovulation in Formosan sambar dose

Hsin-Hung Lin, Chih-Hua Wang, Shann-Ren Kang, Wen-Lin Song, Chin-Hui Tseng, Mu-Jung Cheng, Shyh-Shyan Liu, and Perng-Chih Shen

　　The aim of this study was to examine the effect of different eCG concentrations on the efficacy of superovulation in Formosan Sambar does. All the does were implanted with CIDR for 12 days and superovulation was induced by intramuscularly injection with different concentrations of eCG at day 10. Embryos were collected by flushing the oviduct through midventral laparotomy at day 4 after mating. Results showed that the corpus luteum (CL) numbers of dose superovulated with 1500 (7.3), 2000 (10.6), 3000 (8.5) IU of eCG were significantly higher than that superovulated with 1000 IU of eCG (3.5). However, the embryo recovery rates of dose superovulated with 1000 (85.7%) and 1500 (62.0%) IU of eCG were significantly higher than those superovulated with 2000 (25.5%) and 3000 (5.8%) IU. In conclusion, the best efficiency of superovulation, as indicated by the number of CL and the embryo recovery rate, in Formosan Sambar dose could be achieved by using 1500 IU of eCG.