Vaginal flatulence (flatus vaginalis in Latin) is an emission or expulsion of air from the vagina that may occur during or after sexual intercourse or (less often) during other sexual acts, stretching or exercise. The sound is somewhat comparable to flatulence from the anus but does not involve waste gases and thus often has no specific odor associated. Slang terms for vaginal flatulence include vart, queef[1][2] and fanny fart (mostly British).[3][4]
Vaginal gas that involves strong odor or fecal matter may be a result of colovaginal fistula, a serious condition involving a tear between the vagina and colon, which can result from surgery, child birth, diseases (such as Crohn’s disease), and other causes.[5] This condition can lead to urinary tract infection and other complications. This can also be a symptom of an internal female genital prolapse,[6] a condition most often caused by child birth.[7]
Forcing air into the vagina, especially by blowing in order to cause vaginal flatulence during cunnilingus, can cause an air embolism, which is a potentially life-threatening condition for the woman [8], and for the fetus if she is pregnant.[9]