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Chromotouch Chromosome SNP Microarray Optima Prenatal Test

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Chromotouch Chromosome SNP Microarray Optima Prenatal Test

Short Name: Chromotouch Optima Prenatal

Also known as: Chromotouch Prenatal SNP Microarray, Chromosomal SNP Microarray Optima Prenatal Test, Prenatal Chromosomal Microarray Analysis, Affymetrix Optima Prenatal Microarray

Chromotouch Chromosome SNP Microarray Optima Prenatal Test test available at DNA Labs India for ₹18,500. Uses Affymetrix Optima Suite Microarray, Chromosomal SNP Microarray on Amniotic Fluid, Chorionic Villus, Umbilical Cord Blood samples. Results in Sample accepted daily by 4 pm; report available within 10 working days.. Free home collection in 300+ cities across India.

Genetic TestFemalePregnant Women🏠 Home Collection

✍️ Written By

🩺 Medically Reviewed By

Dr SULOCHANA HEMCHANDRA HOLLA

Dr SULOCHANA HEMCHANDRA HOLLA

Consultant Medical Geneticist · Reg: 8532

Last reviewed: September 7, 2026

Overview

This test is performed to detect fetal chromosomal abnormalities including aneuploidies, microdeletions, and microduplications in pregnancies at increased risk. It supports diagnosis of genetic disorders and helps guide prenatal management and genetic counseling.

Test Code
3461
Price
₹18,500
Sample Type
Amniotic Fluid, Chorionic Villus, Umbilical Cord Blood
Result Time
Sample accepted daily by 4 pm; report available within 10 working days.
Fasting Required
No
Method
Affymetrix Optima Suite Microarray, Chromosomal SNP Microarray
Step 1

Sample Collection

Pre-test genetic counselling is recommended. Informed consent and a completed Genomic Microarray Requisition Form are mandatory. The sample should be collected by an obstetrician or maternal-fetal medicine specialist using aseptic technique.

Method: Amniocentesis, Chorionic Villus Sampling, or Cordocentesis by a specialist

Step 2

Laboratory Analysis

Collect the sample aseptically according to sample type. For amniotic fluid use a sterile screw-capped container. For chorionic villus use transport medium. For umbilical cord blood use a Lavender top EDTA tube and avoid clot formation.

Step 3

Report Delivery

Keep the sample refrigerated and ship immediately. Do not freeze. Ensure that Form 19 and Form 18 are complete and attached.

Timeline: Sample accepted daily by 4 pm; report available within 10 working days.

Patient Instructions

1
Before the Test:Pre-test genetic counselling and signed consent are required. Samples should be collected by an obstetrician or maternal-fetal medicine specialist.
2
During the Test:Collect the sample aseptically according to sample type. Label correctly and avoid clotting of umbilical cord blood.
3
After the Test:Refrigerate immediately and ship without freezing. Attach completed Genomic Microarray Requisition Form and Consent form.

About This Test

Who Should Get This Test

This test is performed to detect fetal chromosomal abnormalities including aneuploidies, microdeletions, and microduplications in pregnancies at increased risk. It supports diagnosis of genetic disorders and helps guide prenatal management and genetic counseling.

How to Prepare

  • Amniotic fluid: collect 15 mL (minimum 10 mL) in a sterile screw-capped container.
  • Chorionic villus: collect 30 mg (minimum 20 mg) biopsy aseptically in 10 mL transport medium.
  • Umbilical cord blood: collect 4 mL (minimum 2 mL) in a Lavender top EDTA tube; avoid clot formation.
  • Ship refrigerated immediately. Do not freeze.
  • Duly filled Genomic Microarray Requisition Form (Form 19) & Consent form (Form 18) are mandatory.

Doctor's Notes

Reviewed by — MBBS, MD (Medical Genetics) · Reg. No. 8532

"This test should be considered after abnormal fetal ultrasound, abnormal maternal serum screening, or other high-risk indicators. Results should be interpreted with genetic counselling and, when necessary, parental follow-up testing."

Last medically reviewed: September 7, 2026

Test Parameters & Specifications

Sample TypeAmniotic Fluid, Chorionic Villus, Umbilical Cord Blood
Sample VolumeAmniotic fluid: 15 mL (10 mL min.); Chorionic villus: 30 mg (20 mg min.); Umbilical cord blood: 4 mL (2 mL min.)
ContainerSterile screw-capped container / 10 mL transport medium / Lavender top (EDTA) tube
Collection MethodAmniocentesis, Chorionic Villus Sampling, or Cordocentesis by a specialist

Sample Stability

Room temperature: Not applicable
Refrigerated: 24 hours
Frozen: Not applicable / Do not freeze
Sample Rejection Criteria:
  • Samples received frozen
  • Clotted umbilical cord blood
  • Insufficient sample volume or tissue
  • Samples without completed Form 19 and Form 18
  • Leaking or unlabelled containers
  • Samples delayed beyond stability limit

Understanding Your Results

A normal result means no clinically significant copy number variant was detected. A pathogenic or likely pathogenic copy number variant may explain abnormal fetal findings or indicate an increased risk of a genetic disorder. Variants of uncertain significance require clinical correlation and possible parental testing. Results should be reviewed by a clinical geneticist or fetal medicine specialist.
📊

Normal

No clinically significant copy number variant detected; residual risk for other genetic disorders remains.

📊

Pathogenic / likely pathogenic CNV

Associated with a known genetic disorder; genetic counselling and obstetric follow-up recommended.

📊

Variant of uncertain significance

Clinical significance is not established; parental testing and ultrasound correlation may be needed.

⚠️ When to Consult a Doctor:

Consult your obstetrician or clinical geneticist if the report shows a pathogenic or uncertain copy number variant, or if fetal ultrasound findings are abnormal.

Limitations

  • ⚠Does not detect balanced chromosomal rearrangements
  • ⚠May not detect low-level mosaicism below the platform threshold
  • ⚠Cannot identify single-gene point mutations
  • ⚠May miss very small copy-number changes below approximately 500 kb
  • ⚠Variants of uncertain significance may require parental testing and clinical correlation

Risks & Considerations

  • ●Procedure-related risks of amniocentesis, CVS, or cordocentesis including miscarriage, infection, bleeding, or membrane rupture
  • ●Possible inconclusive result due to maternal cell contamination or insufficient fetal tissue

Interfering Factors

  • ●Maternal cell contamination of fetal sample
  • ●Clotted or haemolyzed umbilical cord blood
  • ●Insufficient sample volume or tissue
  • ●Freezing or delayed transport of sample
  • ●Improper container or labelling

Compare With Similar Tests

TestChromotouch Chromosome SNP Microarray Optima Prenatal TestKaryotypingFISH Aneuploidy TestNon-Invasive Prenatal TestingWhole Exome Sequencing
ComparisonChromotouch Chromosome SNP Microarray Optima Prenatal TestDetects larger chromosomal imbalances but may miss microdeletions and microduplications.Rapid targeted testing of selected chromosomes but does not provide genome-wide copy-number analysis.Screening test on maternal blood; positive findings require confirmation with invasive diagnostic testing such as CMA.Analyses single-gene variants but is not a first-line test for genome-wide copy-number changes.

Frequently Asked Questions

What is the Chromotouch Chromosome SNP Microarray Optima Prenatal Test?
It is a prenatal chromosomal microarray test that analyses fetal genetic material from amniotic fluid, chorionic villus, or umbilical cord blood to detect chromosomal aneuploidies, microdeletions, and microduplications.
What sample is required for this test?
Amniotic fluid, chorionic villus tissue, or umbilical cord blood may be used depending on the clinical indication and gestational age. Samples must be collected by a specialist.
Who should consider this test?
Pregnant women with abnormal fetal ultrasound findings, abnormal maternal serum screening or NIPT, advanced maternal age, previous chromosomal abnormality, or a known parental chromosomal rearrangement.
What abnormalities can it detect?
It can detect aneuploidies, clinically significant microdeletions, microduplications, and copy number variants as small as approximately 500 kilobases.
How accurate is the test?
The test has a reported sensitivity of over 99% for detection of targeted chromosomal copy-number abnormalities. However, no test detects all possible genetic conditions.
Is fasting required before sample collection?
No, fasting is not required for this test. However, signed consent and completed requisition forms are mandatory.
How is the sample collected?
The sample is collected through an invasive procedure such as amniocentesis, chorionic villus sampling, or cordocentesis by an obstetrician or maternal-fetal medicine specialist.
What is the turnaround time for the report?
The report is usually available within 10 working days after sample acceptance.
What is the cost of the Chromotouch Chromosome SNP Microarray Optima Prenatal Test?
The cost is ?18500 at DNA Labs India. The final price may vary by city and collection requirements.
What are the limitations of this test?
It does not detect balanced rearrangements, single-gene point mutations, or all low-level mosaicism. Some findings may be variants of uncertain significance.
Do I need genetic counselling with this test?
Yes, pre-test and post-test genetic counselling are strongly recommended to understand the purpose, benefits, limitations, and possible outcomes.
How do I book the Chromotouch Chromosome SNP Microarray Optima Prenatal Test?
You can book online through DNA Labs India. Free home sample collection may be available for online bookings, and the test is offered at a discounted price of ?18500 across India.
Worried about the process? Our certified phlebotomists collect thousands of samples every month across India. The process takes under 5 minutes and is virtually painless. Questions? Message us on WhatsApp — we're here 7 days a week.

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For Hospitals & Clinics

Reference Laboratory Services

We serve as a reference laboratory for hospitals and clinics across India. Send samples from your facility with same-day pickup, priority processing, and results delivered through our online portal. Competitive institutional pricing available.

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