Search for: [Description = "According to the number of cornified cells, epithelial cells and leucocytes in vaginal smears the stages of the estrus cycle were determined. Estrus was typified by a vaginal smears which contains cornified cells and no leucocytes and is accompanied by vaginal perforation.The data were obtained during spring \(May\-June\), summer \(July\-September\) and autumn\-winter \(October\-February\)."]