^ Geoffrey Miller (April 2007). "Ovulatory cycle effects on Tip earnings by lap dancers: economic evidence for human estrus?". Evolution and Human Behaviour (28): 375–381.
^ Susan B. Bullivant, Sarah A. Sellergren, Kathleen Stern et al. (February 2004). "Women's sexual experience during the menstrual cycle: identification of the sexual phase by noninvasive measurement of luteinizing hormone". Journal of Sex Research 41 (1): 82–93. doi:10.1080/00224490409552216. PMID 15216427.
^ of the suitors in Odyssey book 22
^ Plato, Laws, 854b
^ Plato, The Republic
^ Herodotus Histories ch.93.1
^ a b Marc E Freeman (1994). "The Neuroendocrine control of the ovarian cycle of the rat". In E Knobil and JD Neill. The Physiology of Reproduction. 2 (Second ed.). Raven Press.
^ W Heape (1900). "The 'sexual season' of mammals and the relation of the 'pro-oestrum' to menstruation'". Q J Micr Sci 44: 1:70.
^ Geoffrey Miller, Joshua M. Tybur, Brent D. Jordan (2007). Evolution and Human Behavior. Ovulatory cycle effects on tip earnings by lap dancers: economic evidence for human estrus? Evolution and Human Behavior. Volume 28, Issue 6, Pages 375–381.
^ medilexicon.com > postpartum estrus citing: Stedman's Medical Dictionary. Copyright 2006
^ Walter, I; G. Galabova, D. Dimov, M. Helmreich (february 2011). "The morphological basis of proestrus endometrial bleeding in canines". Theriogenology 75 (3): 411–420. Retrieved 2011-12-16.
^ McCracken JA, Custer EE, Lamsa JC (1999). "Luteolysis: a neuroendocrine-mediated event". Physiol. Rev. 79 (2): 263–323. PMID 10221982.
^ Yoshinaga, K (1973). "Gonadotrophin-induced hormone secretion and structural changes in the ovary during the nonpregnant reproductive cycle". Handbook of Physiology. Endocrinology II, Part 1.
Spindler, R.E., Wildt, D.E. Circannual variations in intraovarian oocyte but not epididymal sperm quality in the domestic cat.Biology of Reproduction1999;61:188–194.
Pelican, K., Wildt, D., Pukazhenthi, B., Howard, JG. Ovarian control for assisted reproduction in the domestic cat and wild felids. Theriogenology 2006;66: 37–48.
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