Journal of Ultrasound in Medicine, Vol 5, Issue 2 75-79, Copyright © 1986 by American Institute of Ultrasound in Medicine
Fluid in the female pelvis: cyclic patterns
J. A. Davis and B. B. Gosink
A total of 254 pelvic sonograms were performed on 40 volunteers in order to
determine a cyclic pattern, if any, of free fluid in the pelvis in
asymptomatic premenopausal women. Free fluid was observed during all phases
of the menstrual cycle. The highest percentage of positive-for-fluid
sonograms was observed within 5 days preceding onset of menses in both oral
contraceptive users and non-oral contraceptive users. The second highest
percentage was observed between days 13 and 21 in non-oral contraceptive
users.