Diseases related to white cells
Variations in the number of white cells in humans occur
normally from hour to hour, the highest counts being
recorded in the afternoon and the lowest in the early
morning. Temporary increases also normally occur during
muscular exercise, menstruation, pregnancy, and childbirth,
as well as in certain emotional states. Abnormal changes
in the count, appearance, or proportion of the various
white cells are indicative of pathological conditions
in the body.