Vaginal lubrication

Vaginal lubrication is the naturally produced fluid that reduces friction during sexual intercourse. As a woman becomes sexually aroused, the tissue lining the first inch or so of her vagina begins to swell and exude a slippery fluid ("transudate") out through the hundreds of small ducts buried in the lining. These vaginal juices first appear right inside the vagina, and as the woman’s arousal builds, the secretions will run out the opening.

Under perfect conditions a highly aroused young woman will lubricate profusely. Certain medications including some over-the-counter antihistamines, as well as life events such pregnancy, lactation, menopause, aging or diseases such as diabetes, will inhibit lubrication.