... not affect yolk androgen deposition, but decreased yolk progesterone in a cavity-nesting songbird. Sialia mexicana Maternal effect Yolk hormone Androgen Progesterone Developmental plasticity National Science Foundation http://dx.doi.org/10.13039/100000001 DEB-1701672 DEB-1350107...

... to have resulted in the concomitant selection for embryos that differ in their sensitivity and response to maternal egg yolk factors. Thus, complete analyses of yolk hormones and other yolk factors (e.g. lipid concentrations, carotenoids, antibodies) and complementary studies examining the dose-dependent...

... manipulation of yolk hormone levels by females, if it exists, may not be linked to male quality, as has previously been suggested. Nonetheless, we find that variations in song quality of canaries can have a significant and immediate effect upon the female endocrine state and suggest a feedback mechanism...