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. Author manuscript; available in PMC: 2013 Sep 6.
Published in final edited form as: Horm Behav. 2013 Jul;64(2):240–249. doi: 10.1016/j.yhbeh.2013.02.014

Figure 2.

Figure 2

a) Average fE as a function of age in Amboseli females. Each value represents the mean ± SE across females of the log transformed fE concentration (ng/g feces) for a 6-month period. N’s represent the number of females sampled for each age period. The dashed line represents the median age at menarche for the population. b) Average fE as a function of age in female baboons, separating females who did or did not reach menarche in each age period (indicated as separate lines for pre-menarche and post-menarche females). Note that a given female can have 2 values (a pre- and a post- menarche) in the age period in which she reaches menarche. The dashed line represents the median age at menarche for the population. c) Average fE as a function of time before or after menarche; time 0 indicates the attainment of menarche. d) Average fE as a function of age for females that mature early (EM) or late (LM) relative to the population median age at menarche.