The ferning and nitrazine tests of amniotic fluid between 12 and 41 weeks gestation.

@article{Bennett1993TheFA,
  title={The ferning and nitrazine tests of amniotic fluid between 12 and 41 weeks gestation.},
  author={S L Bennett and Jacquelyn B. H. Cullen and David M. Sherer and James R. Woods},
  journal={American journal of perinatology},
  year={1993},
  volume={10 2},
  pages={
          101-4
        }
}
Most studies investigating the usefulness of ferning and nitrazine methods for detecting the presence of amniotic fluid following ruptured amniotic membranes have employed samples from vaginal pooling. Reported accuracies are 84 to 100% for the ferning test and 87 to 97% for the nitrazine test. Our study was designed to determine if these tests are applicable throughout gestation. Samples were obtained from amniocenteses between 14 and 42 weeks. Part I: Of 112 samples allowed to dry on a slide… 
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