摘要：[Objective] The aim was to optimize Yanbian cow oocytes mature in vitro and cleavage system after nuclear transfer based on uniform design. [Method] oocytes were recovered by aspiration method, and oocytes were matured in vitro （IVM） with different conditions, and then carried out nucleus transfer, fusion, activation and in vitro culture （IVC） of embryo. Effects of ovary storage temperature, maturation time and follicular diameter size on in vitro maturation and cleavage rates of cow oocytes were compared. [ Result] The best conditions of IVM of Yanbian cow oocytes was that： the oocytes of 8 mm diameter were matured in vitro for 24 hours when the ovaries were stored at 26℃ or 31 ℃. The best cleave conditions after nucleus transfer of oocytes was that： the oocytes of 6 mm or 8 mm diameter were cultured in vitro for 24 hours when the ovaries were stored at 26℃. [ Conclusion] The result has some reference to Yanbian cow and other cow breeding and population expanding propagation.

摘要：Purpose: Can Cortisol Releasing Hormone (CRH) levels in follicular fluid predict outcomes following assisted reproductive treatment (ART) cycles? Methods: Prospective cohort study of 50 women undergoing in vitro fertilisation (IVF)/intra-cytoplasmic sperm injection (ICSI) cycles over a two month study period. All patients were treated on the long stimulation protocol;follicular fluid was aspirated and pooled for each patient. The samples were processed appropriately and assayed using CRH radioimmunoassay (RIA). Results: This study confirmed that CRH was present in follicular fluid. The average level detected was 173 ± 9 pg/mL (mean ± standard error of mean [SEM]). The data suggests a positive correlation of CRH follicular fluid levels greater than 145 pg/mL with successful ART outcomes. Conclusion: The data indicates a positive correlation between ART outcomes and the presence of follicular fluid CRH levels greater than 145 pg/mL. The results should be interpreted with caution due to the small sample size and pooling of follicular fluid per patient. Furthermore, the pooling of follicular fluid is not representative of CRH levels in an individual follicle, and thus, mature oocyte. This study serves as a reminder to what has previously been hypothesised.