The clinician inserts two fingers into the vagina and gives a sharp upward tap against the lower segment of the uterus. If the fetus is present and not yet engaged in the pelvis, it will float upward and then fall back, tapping against the clinician’s fingers.
The patient lies flat (supine) with the leg fully extended and relaxed. ballottement
Suspected knee trauma, arthritis flare-up, or unexplained swelling. Technique: The clinician inserts two fingers into the vagina