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. Author manuscript; available in PMC: 2010 Nov 18.
Published in final edited form as: J Hum Evol. 2005 Jul;49(1):122–142. doi: 10.1016/j.jhevol.2005.04.003

Fig. 1.

Fig. 1

Mean (±SE) infant carrying effort for females and males across the first nine weeks of infant life, when females conceived DPCID and APCID.