Heterotaxy, Visceral, 9, Autosomal, with Male Infertility, also known as htx9, is related to situs inversus. An important gene associated with Heterotaxy, Visceral, 9, Autosomal, with Male Infertility is MNS1 (Meiosis Specific Nuclear Structural 1). Affiliated tissues include spleen and heart, and related phenotypes are male infertility and dextrocardia