Are hormones found in egg yolk?

Yes, hormones are found in egg yolk, as it contains various biological compounds, including steroids and other hormones. While the primary function of egg yolk is to provide nutrients for the developing embryo, it also contains hormones like estrogen and progesterone. These hormones play roles in reproductive processes in birds, but their levels in egg yolk are generally low and may vary depending on the hen's diet and reproductive status.