The Bible seems to have an appreciation for important blood clotting factors
Why Circumcision on the 8th Day?
"He who is eight days old among you shall be circumcised, every male child in your generations" Genesis 17: 12
Medical scientists have been examining the biological processes that lead to blood clotting. The medical researchers found that two different blood clotting factors, Vitamin K and Prothrombin, are at the highest levels of your life (110% of normal) on the eighth day of life.