Fertile ground... :) Moving on, agreed on follow-up studies. A study similar to this one looking at adolescent moms, non-moms, dads, and non-dads would be very interesting as well. After all, if a teen guy is undergoing similar pruning, what does that mean for his experience of a partner's pregnancy? Disentangling social factors from neuroanatomical changes in teen parents would be very hard, though, in societies where teen pregnancy is unusual and has big economic impacts. Might be easier to do someplace where it's more usual.