Spermatogenic failure-33 (SPGF33) is characterized by multiple morphologic abnormalities of the flagella (MMAF), resulting in immotile spermatozoa and infertility. Short and irregular-caliber flagella are primarily observed, as well as absent and coiled flagella, and abnormalities of the acrosome, head, and base are also present (Kherraf et al., 2018).
For a general phenotypic description and a discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from
OMIM]