Spermatogenic failure-34 (SPGF34) is characterized by multiple morphologic abnormalities of the flagella (MMAF), resulting in immotile spermatozoa and infertility. Irregular-caliber, short, and coiled flagella are primarily observed, as well as absent flagella, and abnormalities of the axoneme are also present (Martinez et al., 2018).
For a general phenotypic description and a discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from
OMIM]