*Beacock, Michelle "Does eating placenta offer postpartum health benefits?" British Journal of Midwifery July 2012,  Vol 20, No 7 pg 466
*Blank MS, Friesen HG. "Effects of placentophagy on serum prolactin and progesterone concentrations in rats after parturition or superovulation." Journal of Reproductive Fertility. 1980 Nov;60(2):273-8
*Enning, Patricia. Placenta :The Gift of Life. Mother Baby Press, 2007
*Kristal, Mark B "Placentophagia: A Biobehavioral Enigma" Neuroscience & Biohehavioral Reviews, Vol. 4, pp. 141--150. 

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