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The fingerprint, a false-positive fern test.

1989; National Institutes of Health; Volume: 73; Issue: 5 Pt 2 Linguagem: Inglês

Jorge G. Lodeiro, Kuang-ping Hsieh, J H Byers, Shawn Feinstein,

Homicide, Infanticide, and Child Abuse

Microscope slides were prepared to confirm the presence of ferning from a 32-week gestation with possible premature rupture of the membranes. Although no amniotic fluid was seen in the vagina, an atypical ferning pattern was produced and was again reproducible with fingerprints on the glass slide. Guidelines to recognize and avoid this source of error are outlined.