Histological changes in the vaginal mucosa of the sow in relation to the oestrous cycle

Abstract

Del~art.tti.cht of Obstetrics andGywcology n?nd the Dqmrtntriit of Anatomy of the Uaiz:or&g of Xochester TWO PLATES (SEVEN FIGURES) INTHOnUCTION The studies of St ockard aiid Papariicolaou 011 the guineapig ( '17) aiicl of Long and 'E;rans on the rat ('22) showed in a most striking manner the definite cyclic changes occurring in tlic vaginal miicosa of these rodents and their relation to the oestrons cycle. Since the appearance of these works, a iiumber of other observers have studied the vaginal smears of other spccics in an effort to correlate the variations found in the ~agilial secretions with the various phases of the oestrous cycle. Thus, Allen ( '22) foiind in the white monse a series of cyclic changes quite similar to those described by Long aiid Evans in the rat, both iii tho vaginal smears as well as in the histological appearance of tlic vaginal mucosa. Hartman ( '23), studying the opossum, also fo1111tl ~ariatioiis in the cell content of the vaginal smears and variations in the histological appearance of the vaginal mucosn at different phases of the oestrons cycle. I n all of these species the variatioas noted were very sharply defined. I n Macacus rhesns, 011 the other hand, Corner ( '23) found irregular variations in the iiiimber of epithelial cells and Ieucocyt es found in the vaginal smears. Observations by Murphey ( '22) in the ox and by Zupp ('24) in the sow also showed variations in the leucocyte and epithelial cell content of the vagiiial smears at different periods of the oestrons 417

Estrus cycle monitoring of captive collared peccaries (Pecari tajacu) in semiarid conditions

“…Furthermore, a correspondence between vaginal cytology and estradiol profile was suggested for the Amazonian individuals (Mayor et al 2007b). However, the present results indicate that there are no significant changes in the proportion of the vaginal epithelial cells between estrogenic and progesterone phases by vaginal cytological examination, similarly as reported for domestic sows (Wilson 1926). Also, no significant relation amongst the vaginal epithelial cells and reproductive steroids were found during the estrus cycle of collared peccaries bred in captivity under semiarid conditions.…”

Vaginal Histology of the Domestic Pig: Histomorphology From Birth to 8 Years With Some Clinical Aspects

“…Since the hog is being used more frequently as a laboratory animal for comparative studies in the paramedical professions, the authors felt there was a need to report their observations. Cyclic changes in the epithelium of the vagina of the sow have been investigated and reported by McKenzie (1926), Wilson (1926), Baker, Woehling, Casida & Grummer (1953), DeBois, Muurling & Wensing (1965), Done & Heard (1968) and Bal, Wensing & Getty (1969). (Table 1) raised in a known environment and on a known diet at the swine farm of Iowa State University.…”

Vulvar Discharge Syndrome in Loosely Housed Finnish Pigs: Prevalence and Evaluation of Vaginoscopy, Bacteriology and Cytology

“…Literature on sow vaginal cytology is sparse. However, research on cytology after parturition (Berner and Jochle 1988) and an old study on vaginal cytology of sows at slaughter at different stages of oestrus assessed by the appearance of the ovaries (Wilson 1926) are available. In addition, one study investigated the cytology of vaginal smears after sham artificial insemination of sows with cleaned vulva and sows with faeces‐soiled vulva (Carabin et al.…”