Rheumatoid factor (RF) is a blood test that measures the amount of the RF antibody in the blood.
Weight ranges from about 7 to 12 kilograms (15 to 26 lb) in females, and from 9 to 18 kilograms (20 to 40 lb) in males.[4] Where does a serval live? The Serval lives in Africa.
Life expectancy is about 10 years in the wild, and up to 20 years in captivity. The longest recorded life of an African serval in the wild is 23 years of age. In captivity, average lifespan is 22.4 years.