Vaginal pH during estrus in mares.
Vaginal hydrogen ion concentration of Saddlebred mares was measured throughout the behavioral estrous period. The mean pH on the day of ovulation was significantly (P = <.01) lower than on all other tested days of estrus. Follicular development and vaginal pH values in pony mares at time of slaughter were highly correlated. A significant decrease in vaginal pH values, determined through a series of carefully monitored measurements during estrus, was found to be characteristic and indicative of ovulation.
Polak
K L
KL
Department of Animal Industries, Southern Illinois University, Carbondale, Illinois 62901, USA.
Kammlade
W G
WG