laboratory diagnostic - biochemistry - Acetylcholine Esterase - amniotic fluid - neural tube defects, Fresh amniotic fluid at ambient temperature, non-hemorrhagic. Always attach: - The pregnancy data: date of pregnancy, number of foetuses, number of sacs sampled in case of twin pregnancy, ultrasonographic signs, abnormally high AFP level in serum Down's syndrome test, Depakine® treatment. DO NOT freeze or refrigerate the sample, send at ambient temperature, PAGE, ssso, todylaboratories®, bmn, code L16LD1110