ESR (erythrocyte sedimentation rate) is a blood test that measures how quickly red blood cells settle to the bottom of a test tube over a certain amount of time. The normal range for ESR in females can vary depending on age, but generally, a normal ESR for females is less than 20 mm/hour.
An ESR of 40 mm/hour in a female may be considered high, but it is important to note that ESR can be affected by a variety of factors, including age, inflammation, infection, and pregnancy. Therefore, it is important to consider the individual’s medical history and other test results when interpreting the significance of a high ESR value. Your healthcare provider is the best person to discuss your ESR results and what they may mean for your health.