Figure 1From: The roles of testicular nuclear receptor 4 (TR4) in male fertility-priapism and sexual behavior defects in TR4 knockout miceTR4-/- males display priapism. A. TR4+/+ male (left), and TR4-/- male (right) showing priapism; both mice were 7 mo. old. B. Number and percentage of TR4-/- mice showing priapism at various ages.Back to article page