V i p vegina

Vaginal lubrication is a naturally produced fluid that lubricates a vagina. Vaginal lubrication is always present, but production increases significantly near ovulation and during sexual arousal in anticipation of sexual intercourse. Vaginal dryness is the condition in which this lubrication is insufficient, and sometimes artificial lubricants are used to augment it. Without sufficient lubrication, sexual intercourse can be painful.

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Vaginal lubrication

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The sexually quiescent human vagina is a just moist, potential space with a minimal blood flow and very low luminal oxygen tension. The first measurable sign of sexual arousal is an increase in the blood flow. This creates the engorged condition, elevates the luminal oxygen tension and stimulates the production of surface vaginal fluid by an increased plasma transudation that saturates the fluid reabsorptive capacity of the epithelium.
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The human vagina is known to be heavily innervated by vasoactive intestinal polypeptide VIP immunoreactive nerve fibres. In the present study we have examined the effect of VIP pmol x kg-1 x h-1, IV during 30 min on vaginal lubrication and blood flow in fourteen normal non-pregnant women. Vaginal blood flow was measured by the heat clearance technique and the vaginal lubrication quantified by the weight gain of preweighed filter papers placed on the surface of the vaginal wall for 30 min.
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