Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.
POD stands for 'Pouch of Douglas'. It is also known as cul-de-sac. It is
recto-uterine pouch, which is the extension of the
peritoneal cavity between the
rectum and the posterior wall of the
uterus in the female human body. Normally, free fluid present in POD is minimal in quantity.
Evidence of fluid within POD can be either physiological or pathological.
Physiological causes include:
1. ruptured follicles
2. retrograde menstruation
3. increase in ovarian permeability due to
estrogen influence
Pathological causes include:
1. ruptured ectopic pregnancy
2. pelvic inflammatory disease
3. tubo-ovarian abscess
4. pelvic abscess/hematoma
5. gross ascites
6. following culdocentesis
7. hydatiform mole
Collection of fluid does not specify what could be the cause. The cause needs to be ascertained based on the clinical evaluation and treatment needs to be instituted accordingly.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Ashakiran S.