Figure 2From: Estrogen receptor transcription and transactivation Estrogen receptor knockout mice: what their phenotypes reveal about mechanisms of estrogen actionGross morphology of adult ERKO female reproductive tracts. Reproductive tracts dissected from wild-type and βERKO animals are normal, while the αERKO uterus is immature and the ovaries are enlarged and dark-colored due to hemorrhagic cysts.Back to article page