MedGen

Spermatogenic failure-6 (SPGF6) is a form of male infertility with globozoospermia. The acrosome is a unique structure of the mature spermatozoon, which plays an important role at the site of sperm-zonapellucida binding during the fertilization process. Globozoospermia (also called round-headed spermatozoa) is a human infertility syndrome caused by spermatogenesis defects (Lalonde et al., 1988, Singh, 1992). The most prominent feature of globozoospermia is the malformation of the acrosome and, in the most severe cases, the acrosome is totally absent. Globozoospermia is also characterized by abnormal nuclear shape as well as abnormal arrangement of the mitochondria of the spermatozoon (Battaglia et al., 1997). For a discussion of phenotypic and genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

Spermatogenic failure-9 (SPGF9) is associated with globozoospermia, a rare phenotype of primary male infertility characterized by the production of a majority of round-headed spermatozoa without an acrosome (summary by Harbuz et al., 2011). For a general phenotypic description and a discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

Spermatogenic failure-68 (SPGF68) is characterized by male infertility due to sperm being round-headed (globozoospermia) and lacking the acrosome (Oud et al., 2020). For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

Spermatogenic failure-69 (SPGF69) is characterized by male infertility due to sperm being round-headed (globozoospermia) and lacking the acrosome (Oud et al., 2020). For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

Spermatogenic failure-66 (SPGF66) is characterized by male infertility due to all sperm being round-headed (globozoospermia) and lacking the acrosome (Oud et al., 2020). For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

Spermatogenic failure-67 (SPGF67) is characterized by male infertility due to sperm being round-headed (globozoospermia) and lacking the acrosome (Oud et al., 2020). For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

Spermatogenic failure-85 (SPGF85) is characterized by male infertility due to globozoospermia and reduced progressive motility (Chen et al., 2021). For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]

X-linked spermatogenic failure-7 (SPGFX7) is characterized by male infertility due to significantly reduced sperm concentration and progressive motility, with abnormalities of the head and flagella. Patient sperm show insufficient individualization, excessive residual cytoplasm, and defects in acrosome development (Zhang et al., 2023). For a discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150). [from OMIM]