"Vulvo-vaginal gland.-- M. Huguier has given a description of a gland situated at each side of the junction of the vulva to the vagina. The gland he describes as about the size and form of an apricot kernel, and is provided with an excretory duct, about seven or eight lines in length, the external aperture of which is situated in the angle between the vulva and the border of the hymen. This gland is small until puberty, when it is developed with the other organs of generation; it becomes turgid during sexual excitement, and secretes a quatity of clear mucus-looking fluid, which it is said to ejaculate with some force. This gland is regarded as closely analagous to Cowper's gland in the male... It may be absent on one or both sides." (Med Times 1847;16:355)
This a controversial topic, though I have not researched it myself. However, this seems to settle the matter.