title: Anterior vaginal and intrauterine pressures in mares.
abstract: Resting pressure in the anterior vagina and uterus was measured monthly in eight mares for 5 mo. During this time, four of the mares maintained their body weight and four lost weight. Mean anterior vaginal pressure was -11.9 mmHg, and intrauterine pressure was -5.3 mmHg; the latter was positively correlated to body weight and weight/height ratio. Anterior vaginal pressure and uterine pressure were also positively correlated. Allowing air into the anterior vagina raised this pressure to -4.0 mmHg, i.e. higher than uterine pressure. There was a tendency for genital tract pressures to be lower in anoestrous mares than those which remained cyclic. Some physiological events caused marked increases in genital pressures.
authors.affiliation: Dept. of Animal Health and Production Royal Veterinary College Hawkshead Lane, North Mymms Hatfield, Herts, United Kingdom.
authors.forename: P J
authors.initials: PJ
authors.lastname: Goddard
authors.forename: W
authors.initials: W
authors.lastname: Edward Allen