Cheng, Z. R., Oguejiofor, C. F., Swangchan-Uthai, T., Carr, S., & Wathes, D. C. (2015). Relationships between Circulating Urea Concentrations and Endometrial Function in Postpartum Dairy Cows. Animals, 5(3), 748-773. https://doi.org/10.3390/ani5030382