Does a man's testosterone "rebound" as dependent children grow up, or when pairbonds end? A test in Cebu, Philippines.

We found modest support for the prediction that men experience less of an age-related drop in T as their youngest child ages, a trend that might strengthen as children age further. We also replicate the finding that separated men have higher T, although longitudinal changes in the hormone were not significantly different in these men. Our data suggest that, of two life history transitions that may predict renewed mating effort, pair bond loss is more strongly endocrine mediated than potential mating effort shifts related to the aging of children.