![Vulva at Proestrus.](images/wb00024.jpg)
Vulva at Proestrus.
Normal slightly swollen labia, characteristic of proestrus.
Vale WG (1987)
![Estrous Vulva.](images/wb00021.jpg)
Estrous Vulva.
The vulva of this buffalo in heat is slightly swollen, and there is a scant mucous discharge.
Vale WG (1987)
![Erythema of the Vulva.](images/wb00023.jpg)
Erythema of the Vulva.
During estrus the lips of the vulva become edematous, and the mucous membranes erythematous.
Vale WG (1987)
![Frequent Urination.](images/wb00022.jpg)
Frequent Urination.
This buffalo shows signs of estrus by virtue of frequent urination and a slightly laterally deviated tail.
Vale WG (1987)
![Obstetrical Trauma.](images/wb00441.jpg)
Obstetrical Trauma.
Old obstetrical injury of the dorsal commissure of the vulva.
Vale WG (1987)
![Physical Injury.](images/wb00458.jpg)
Physical Injury.
Trauma of the left labia may be due to dog bite, or the animal may have backed into a sharp object.
Vale WG (1987)