Egg Yolk Layers Vary in the Concentration of Steroid Hormones in Two Avian Species

Yolk is a source of maternal testosterone for developing birds.

Hubert Schwabl · Proceedings of the National Academy of Sciences · 1993 · 871 citations

Life Sciences, Biology, Endocrinology +14

The determination of five steroids in avian plasma by radioimmunoassay and competitive protein-binding

John C. Wingfield, Donald S. Farner · Steroids · 1975 · 638 citations

Life Sciences, Biochemistry, Hormone Biochemistry +12

Maternal testosterone in the avian egg enhances postnatal growth

Hubert Schwabl · Comparative Biochemistry and Physiology Part A Physiology · 1996 · 576 citations

Life Sciences, Developmental Biology, Endocrinology +14

The Endocrinology of a Natural Breeding Population of the White-Crowned Sparrow (Zonotrichia leucophrys pugetensis)

John C. Wingfield, Donald S. Farner · Physiological Zoology · 1978 · 304 citations

Life Sciences, Animal Sciences, Endocrinology +14

A hormonal mechanism for parental favouritism

Hubert Schwabl, Douglas W. Mock, Jennifer Gieg · Nature · 1997 · 271 citations

Social Sciences, Endocrinology, Psychology +14