Bercovitch, F. B., Goy, R. W., Scheffler, G. et al. 1987. A benign method for maintaining ovulatory estrogen levels in cycling rhesus macaques. American Journal of Primatology 13, 67-72.

Traditional blood collection procedure is described. "Blood samples were obtained by removing the subjects from their home cages, transporting them to the surgery room, and withdrawing 3 ml of blood from either the right or left femoral vein. One person held the subject female dorsally atop the operating table while a second individual withdrew the blood specimen."