Test Catalog

Test ID: PPAP    
Parental Sample Prep for Prenatal Microarray Testing

Useful For Suggests clinical disorders or settings where the test may be helpful

Preparing parental blood samples for possible confirmation testing if an abnormality is detected on the prenatal array sample


DNA extraction of the maternal blood sample used for maternal cell contamination testing

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

This test can only be ordered on the parents when a prenatal microarray test has been ordered on the fetal sample.


This test ID contains no charge and serves as a way to correlate proband and parental specimens. If additional testing is warranted, the appropriate tests will be added. 


When prenatal microarray analysis is ordered, parental blood samples are collected and prepared for confirmation studies should an abnormality be detected on the prenatal sample. If an abnormality is detected on the fetal sample, the most appropriate testing (microarray, FISH, or chromosome analysis) to aid in the interpretation of the prenatal result is performed on the parental samples. A paternal blood sample is desired but not required.


Maternal cell contamination testing will be performed on the maternal blood and prenatal samples to rule out the presence of maternal cells in the fetal sample.

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

In order to interpret equivocal array results on a prenatal sample (amniotic fluid or chorionic villus), parental studies are performed to determine if the abnormality detected on the prenatal array is inherited or de novo.


Maternal cell contamination testing is performed on the maternal blood and prenatal sample to detect the presence of maternal cells in the fetal sample.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

An interpretive report will be provided.

Interpretation Provides information to assist in interpretation of the test results

No interpretation will be provided. This test is for sample processing only.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

No significant cautionary statements