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Sperm storage in the reproductive tract of the female Japanese long-fingered bat, Miniopterus schreibersii fuliginosus

T. Mri and T. A. Uchida

Summary. In the Japanese long-fingered bat, Miniopterus schreibersii fuliginosus, spermatozoa in contact with the microvilli of non-ciliated cells in folds in the uterotubal junction appeared normal, while spermatozoa remaining in the uterus degenerated and were engulfed by a massive invasion of polymorphonuclear leucocytes. No leucocytes were seen in the uterotubal junction area. It is suggested that the spermatozoa in this area are being stored, probably until ovulation occurs.