MOLECULAR GENETICS

NGS

AF/POC/FOETUS/CVS &PARENTS EDTA

* Fasting: No fasting is required for any of the individuals (pregnant mother, father, or for the collection of fetal/POC samples). *
* Medications/Supplements: * Generally, routine medications and supplements do not interfere with DNA analysis. However, it is advisable for the pregnant mother to inform her doctor about all current medications and supplements, especially those that might affect fetal development or the medical indication for the test. *
* Clinical History Required (Absolutely Crucial): Providing detailed and accurate clinical information about the fetal proband and the family is paramount for the successful interpretation of the extensive genetic data generated. This guides the geneticists and bioinformaticians in prioritizing and interpreting identified genetic variants relevant to the fetal condition. * Detailed Fetal Phenotype/Anomalies: Comprehensive ultrasound findings (e.g., type and severity of structural anomalies, hydrops, growth restriction, specific organ involvement), MRI findings, and any other relevant clinical observations. Post-loss, detailed autopsy findings are crucial. *
* Reason for Testing: Clearly state the indication for the test (e.g., abnormal ultrasound, suspected genetic syndrome, family history of undiagnosed disorder, recurrent pregnancy loss with previous abnormal fetuses). *
* Family History: A detailed family pedigree for both prospective parents, including information on any relatives with similar symptoms, known genetic conditions, previous miscarriages, stillbirths, or consanguinity (blood relationship between parents). *
* Previous Genetic Test Results (Fetal & Parental): Provide results of any prior chromosomal microarray, karyotype, targeted gene panels, or biochemical tests performed on the fetus or parents. *
* Parental Information: Clinical information for both biological parents, especially if they have any health conditions or are known carriers of genetic variants. *
* Genetic Counseling (Highly Recommended and Often Required): * Pre-test genetic counseling with a qualified genetic counselor or medical geneticist is strongly recommended and often a mandatory step. *
* Reason: They can explain the comprehensive nature of this test, its benefits, limitations, potential outcomes (including variants of uncertain significance - VUS, and incidental findings for all three individuals), the critical implications of MCC, the unique challenges of prenatal/fetal genetic testing, implications for future pregnancies, and help ensure informed consent from all participating adults. *
* Informed Consent: * Due to the complexity, sensitivity, and profound implications of this genetic testing, detailed informed consent is required from the pregnant mother and father. This typically covers the scope of analysis, handling of MCC, interpretation of results, data privacy, and policies regarding secondary/incidental findings for all three individuals. *
* Sample Collection Expertise: * The collection of fetal samples (CVS, AF, POC) requires specialized medical procedures performed by experienced clinicians to minimize risks and maximize the quality of the sample. Proper handling and transport of the sample to the lab are crucial. *
* Timeliness of Sample Collection: * For prenatal diagnosis, samples are ideally collected within specific gestational windows. For POC, collection immediately after miscarriage/termination and proper preservation are important to ensure DNA quality. *
* Biological Relationship Confirmation: * The lab may require documentation or request genetic markers to confirm the biological relationship between the fetus and the parents, as accurate familial relationships are paramount for the trio analysis.