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Diagram of the mating plug in the Drosophila melanogaster female lower reproductive tract. The uterus is shown containing the mating plug (AMP + PMP; for anterior + posterior mating plug, respectively). The figure also shows the sperm storage organs (seminal receptacle (SR), spermathecae (ST)), the parovaria (Pa), and the lower common oviduct (Ov). The upper reproductive tract (ovaries, lateral oviducts, upper common oviduct) is not shown, for simplicity.
