Growth and hematologic development of the patas monkey (Erythrocebus patas) to one year of age.

Data from 338 blood samples of 31 patas monkeys is presented to show the normal hematolgoic development from birth to one year of age, and is compared to 120 samples from normal adults. Marked changes in hematocrit, hemoglobin, red cell numbers, and leukocyte distribution which occurred during the first month were followed by a slow progression to adult values. Body weight data is also presented which shows a linear growth rate during the first year of life.