MGI:96569Mutant mice develop gonadal sex cord-stromal tumors with nearly 100% penetrance and develop cachexia-like symptoms. The wasting syndrome is not observed in gonadectomized mutant mice, which develop adrenal tumors. Homozygous inhibition of inhibin activity leads to increased ovulation but reduced embryo/fetal/newborn survival of offspring of affected mothers, while heterozygote mothers show increased fecundity.