Spermatogenic failure-81 (SPGF81) is characterized by male infertility due to oligoasthenoteratozoospermia. Patient spermatozoa exhibit acrosomal hypoplasia as well as detachment of the acrosome from the sperm head, and also show markedly reduced progressive motility (Liu et al., 2023) For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150).

Spermatogenic failure-86 (SPGF86) is characterized by male infertility due to acrosomal defects of the spermatozoa, resulting in oocyte activation deficiency and fertilization failure. Some oocytes exhibit early embryonic arrest after successful fertilization with patient sperm using assisted reproductive technology (Xin et al., 2020; Wang et al., 2021). For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150).