The fern test is a medical laboratory test used in obstetrics and gynecology. The name refers to the detection of a characteristic " fern like" pattern of vaginal secretions when a specimen is allowed to dry on a glass slide and is viewed under a low-power microscope.

The fern test is based on the ability of amniotic fluid to form a microscopic crystalline pattern that resembles fern leaves when the fluid air dries on a glass slide. Performed by authorized providers in the point of care.

ferning [ fern´ing ] the appearance of a fernlike pattern in a dried specimen of cervical mucus, an indication of the presence of estrogen, usually seen at the midpoint of the menstrual cycle ; it can be helpful in the determination of ovulation .

The presence of arborized crystals (ferning) in amniotic fluid is both sensitive (74%-100%) and specific (77%-100%) for diagnosing rupture of membranes in laboring women who report loss …

Ferning in amniotic fluid: Is it a useful indicator of ruptured membranes? yes. Thepresence of arborized crys-tals (ferning) in amniotic fluidis both sensitive (74%-100%) and specific (77%-100%) for diagnosing rupture of membranes in laboring women who re-port loss of fluid(strength of recommenda-

The Fern test is a straightforward, non-invasive diagnostic procedure used to analyze cervical mucus or vaginal secretions. It gets its name from the distinctive fern-like crystallization patterns that appear when these fluids, such as cervical mucus or amniotic fluid, dry on a microscope slide.

Jan 14, 2019 · The presence of arborized crystals (ferning) in amniotic fluid is both sensitive (74%-100%) and specific (77%-100%) for diagnosing rupture of membranes in laboring women who report loss of fluid (strength of recommendation [SOR]: A, …

Ferning Pattern. The arborization pattern found when a drop of amniotic fluid is allowed to air dry on a microscope slide, known as ferning. (Photo contributor: Robert Buckley, MD.)

Jun 24, 2023 · A positive ferning pattern indicates the woman has reached her peak fertility for the menstrual cycle. It means ovulation is occurring or is about to occur within the next 24-48 hours. The egg only lives for about 24 hours after ovulation.

Both drying time and blood impacted the detection of ferning with previable ROM. Optimal detection was seen after allowing drying for 5 minutes and with centrifuge for the removal of red blood cells. These findings may improve the detection of ferning in …