Days Set Up
Analytic Time

8 - 15 days

MiChart Code
Acetylcholinesterase, Amniotic Fluid
Soft Order Code

Test Updated:



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Test Overview

Test Methodology

Polyacrylamide Electrophoresis

Test Usage

The presence of AChE in amniotic fluid is positive for a neural tube defect (open tube defects, and to a lesser degree, ventral wall defects) if fetal contamination can be ruled out.

Reference Range


* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Submit 1 ml of uncentrifuged amniotic fluid. Refrigerate. A specimen from the 16-18 week gestational period of pregnancy is preferred; from the 14-21 week is acceptable. GESTATIONAL AGE IS REQUIRED ON THE REQUISITION FOR PROCESSING.

Normal Volume
1 mL amniotic fluid
Minimum Volume
0.3 mL amniotic fluid

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.