Bovine patches

Bovine Pericardium is commonly used in surgery, including cardiovascular surgeries. It has a lot of benefits, including, but not limited to, better compatibility, easier to handle, less likely to bleed, and less likely to get infected. However, long-term results of usage have been poorly documented
Li, Xin, et al. “Current Usage and Future Directions for the Bovine Pericardial Patch.” Annals of Vascular Surgery, U.S. National Library of Medicine, May 2011, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3085588/.
(^ For a more in-depth explanation)