Scanning electron microscopy (SEM) has been used to study the morphology

well as tissue organization of uterine epithelium during delayed implantation(Psychoyos & Mandon, 1971) and cervical neoplasia (Jordan & Williams, 1971). The purpose of this study was to observe the morphology and tissue organization of ciliated and secretory epithelium in the female reproductive tract. The reproductive tracts of four adult female crab-eating macaque, Macaca fascicularis, and six adult female New Zealand rabbits were dissected 3 hr post coitum, with or without fixation in vivo with 2 % glutaraldehyde (Reinius & Nilsson, 1969). Tissue specimens were pinned to Dow Corning 780 sealant and fixed for 20 hr in refrigerated 4 % or 6 % cacodylate-buffered glutaraldehyde. The fixative was decanted and replaced with cacodylate-buffered sucrose(Sabatini, Bensch & Barnett, 1963). After 24 to 30 hr in sucrose, the specimens were washed twice in the buffer solution and post-fixed for 1 hr in buffered 1\m=.\2%osmium tetroxide (Kanagawa, Hafez, Baechler, Pitchford & Banrhart, 1972). The tissues were rinsed twice with 70 % ethanol and dehydrated in graded concentrations of ethanol to 100 % and then in 100 % propylene oxide(Cleveland & Schneider, 1968). The samples were infiltrated for 30 to 90 min at room temperature wit