There is a diference both in the hbA1c and the readings on the glucose meters
depending upon the hematcrit, or the number of
erythrocytes per unit volume. The meters are calibrated to a specific number of cells per unit volume, which is a compromise between the readings of the male and the female.
Males have a hematcrit of around 46 and females, because of menstrual bleeding, often end up between 36 and 38.