The contents of maternal testosterone in house sparrow Passer domesticus eggs vary with breeding conditions.
Schwabl
H
H
Rockefeller University, Field Research Center for Ecology and Ethology, Millbrook, New York 12545, USA.
D000818:Animals; D000835:Animals, Wild; D001717:Birds / Q000097:blood*; D001947:Breeding; D004530:Egg Yolk / Q000737:chemistry; D005260:Female; D009518:New York; D010063:Ovum / Q000737:chemistry*; D012098:Reproduction / Q000502:physiology*