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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.