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Scanning Electron Microscopic Study of the Porcine Oviduct and Uterus

Oregon State University, Corvallis 97331 and University of Wisconsin, Madison 53706

Abstract

The luminal surfaces of epithelial cells of oviduct and uterus from 16 sows at days 1, 3 and 9 of estrous cycle were examined with the scanning electron microscope. Cyclic structural changes were noted at certain stages of the estrous cycle. Ciliated cells were numerous in the fimbria, ampulla and isthmus, less abundant in the utero-tubal junction or uterine body and very rare in the cervix. At estrus, ciliated cells predominated the oviduct. At Day-3 or Day-9 of the cycle, secretory cells were well developed in the fimbria, ampulla and isthmus. These secretory cells became more densely populated with microvilli than those found in uterine body or cervix. No apparent deciliation of ciliated cells was observed in these stages of the estrous cycle. The results also suggest a regional difference of sensitivity of the porcine reproductive epithelium in its response to endogenous hormonal effect.