Female reproduction is known to be influenced by food availability and its impact on
energetic status. However, emerging evidence suggests that the phytochemical content of
food may also be an important factor. Here, we investigated this hypothesis, presenting
20months of data on fecal progestin (fP) patterns in wild female Phayre's leaf monkeys
(Trachypithecus phayrei crepusculus). We examined whether (a) the availability of Vitex (a
plant known to contain phytochemicals) might be linked to seasonal fP levels,(b) fP levels …