Test Code LAB469 FERN TEST, VAGINAL FLUID
Additional Codes
CPT Code: 87210
Performing Laboratory
Peninsula Regional Medical Center - Hematology
Specimen Requirements
Collect specimen as follows:
1. Using a lead pencil, label frosted end of glass slide with patient’s first and last name and Social Security number prior to obtaining specimen.
2. Using a sterile, cotton-tipped swab or pipette, obtain vaginal liquid pool specimen and transfer to glass slide.
3. Allow slide to air dry.
4. Place slide in a slide/cardboard holder.
5. Deliver specimen to Hematology Laboratory immediately.
Reference Values
A positive Fern Test indicates presence of amniotic fluid in vagina. This occurs when membranes rupture.
A negative Fern Test indicates absence of amniotic fluid in vagina.