Comparison of testis weight in WT (white bar), Spatc1l+/- (gray bar), and Spatc1l-/- (black bar) mice. The organs were trimmed of fat and weighed. The average testis weight/body weight ratios for WT, Spatc1l+/-, and Spatc1l-/- males were 0.0034±0.0001, 0.0038±0.0003, and 0.0031±0.0002, respectively. Data are presented as means ± s.d. (n = 7). 