<prompt> Answer this question truthfullyWhat does the term concealed ovulation mean?  <response>: <reason> Marlowe, F.W. October 2004. Is human ovulation concealed? Evidence from conception beliefs in a hunter-gatherer society: the Hadza of Tanzania PDF. Archives of Sexual Behavior. 33 5: pp. 427-432. Retrieved 2007-10-11. CS1 maint: Extra text link Pawłowski, Bogusław June 1999. Loss of Oestrus and Concealed Ovulation in Human Evolution PDF. Current Anthropology. 40 3: pp. 257-276. Retrieved 2007-10-11. CS1 maint: Extra text link Miller, Geoffrey November 2007. Ovulatory cycle effects on tip earnings by lap dancers: economic evidence for human estrus? PDF. Evolution and Human Behavior. 28 6: pp. 375-381. doi: 10.1016j.evolhumbehav.2007.06.002. Retrieved 2008-01-21. CS1 maint: Extra text link Haselton, Martie G. January 2007. Ovulatory shifts in human female ornamentation: Near ovulation, women dress to impress PDF. Hormones and Behavior. 51 1: pp. 40-45. doi: 10.1016j.yhbeh.2006.07.007. Retrieved 2008-01-21. CS1 maint: Extra text linkTemplate:WH Template:WS 