The Best Vaginal Moisturizers and Creams for Vaginal Dryness Primarily caused by declining estrogen levels, it can result in discomfort, pain during intercourse, and an increased risk of vaginal infections. Less estrogen results in lower blood flow and lubrication, causing thinning Vagina: Anatomy, Function & What to Look Out For Arousal, lubrication AND the vestibular glands. The greater and lesser vestibular glands or bartholin and skene glands secrete fluid which provides lubrication. However, this is not the primary source of vaginal lubrication. White Discharge After Sex: What It Means and When to Worry Thomson Medical