Mates of Acp36DEdsRNA.Sym.Scer\UAS Scer\GAL4αTub84B.PL males fail to reach the final stage of the uterine conformational changes; the majority of Acp36DEdsRNA.Sym.Scer\UAS knockdown mates appear to have stalled in the 'middle' stages. After stage 5, the reproductive tracts of mates of Acp36DEdsRNA.Sym.Scer\UAS knockdown males do no proceed efficiently, or completely, through the subsequent stages. With the conformational stages blocked at the hourglass stage, the sperm do not condense into a single mass. Instead, the sperm mass remains below the hourglass constriction, becoming more dispersed than normal in the posterior uterus. Sperm storage in Acp36DEdsRNA.Sym.Scer\UAS is approximately 60% of that of controls at 1 hour after the start of mating.