A spectrophotometric artefact in postal specimens of amniotic fluid.
D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis*; D004899:Erythroblastosis, Fetal / Q000175:diagnosis*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D010209:Paper; D011177:Postal Service; D011247:Pregnancy; D011379:Prognosis; D013048:Specimen Handling; D013053:Spectrophotometry; D013242:Sterilization