Epididymis weight in WT (white bar), Spatc1l+/- (gray bar), and Spatc1l-/- (black bar) mice. The average epididymis weight/body weight ratios for WT, Spatc1l+/-, and Spatc1l-/- males were 0.001±0.0001, 0.001±0.0001, and 0.001±0.00008, respectively. Data are presented as means ± s.d. (n = 7). 