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Testicular histology and macroscopic views of testes and urogenital blocks of different mouse genotypes: (A) WT, (B) Fshr-CAM, (C) Fshr-CAM/LuRKO, and (D) LuRKO mice. (A–C) show normal spermatogenesis and testis and seminal vesicle (SV) sizes. In (D), spermatogenesis is arrested at the round spermatid (RS) stage, with small testes and rudimentary seminal vesicle (not visible). Scale bars: 50 μm; 10 mm (insets). From [133], with permission.
