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FISH - Postnatal Gender Confirmation Test

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FISH - Postnatal Gender Confirmation Test

Short Name: FISH Gender Confirmation Test

Also known as: FISH Test, Fluorescence In Situ Hybridization Test

FISH - Postnatal Gender Confirmation Test test available at DNA Labs India for ₹6,000. Uses Fluorescence In Situ Hybridization (FISH) on Whole blood samples. Results in Report available in 4 days. Free home collection in 300+ cities across India.

Diagnostic TestNeonatal🏠 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

For evaluating ambiguous genitalia, gender reversal cases, and confirming gender in newborns.

Test Code
596
Price
₹6,000
Sample Type
Whole blood
Result Time
Report available in 4 days
Fasting Required
No
Method
Fluorescence In Situ Hybridization (FISH)
Step 1

Sample Collection

Duly filled Chromosome & FISH analysis Requisition Form (Form 17) is mandatory.

Method: Venipuncture

Step 2

Laboratory Analysis

Standard venipuncture procedure for blood collection from the newborn.

Step 3

Report Delivery

Label the sample correctly and transport at 18-22°C without freezing.

Timeline: Report available in 4 days

Patient Instructions

1
Before the Test:Ensure the requisition form is completed and the sample is collected properly.
2
During the Test:Blood sample is analyzed using FISH technology to detect sex chromosomes.
3
After the Test:Results are available within 4 days and can be accessed online.

About This Test

Who Should Get This Test

For evaluating ambiguous genitalia, gender reversal cases, and confirming gender in newborns.

How to Prepare

  • Collect 5 mL whole blood in a Green Top (Sodium Heparin) tube.
  • Ship at 18-22°C. DO NOT FREEZE.
  • Ensure requisition form (Form 17) is duly filled.

Doctor's Notes

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

"This test is essential for accurate gender confirmation in newborns with ambiguous genitalia, aiding in timely medical intervention and counseling."

Last medically reviewed: September 7, 2026

Test Parameters & Specifications

Sample TypeWhole blood
Sample Volume5 mL (3 mL min.)
ContainerGreen Top (Sodium Heparin) tube
Collection MethodVenipuncture

Sample Stability

Room Temperature: 48 hrs
Refrigerator: NA
Frozen: NA
Sample Rejection Criteria:
  • Insufficient sample volume
  • Hemolyzed sample
  • Improper container
  • Missing requisition form

Understanding Your Results

Results are interpreted based on the presence or absence of X and Y chromosomes. Presence of Y chromosome indicates male gender, while absence indicates female gender.
📊

X and Y chromosomes detected

Male gender confirmed

📊

Only X chromosomes detected

Female gender confirmed

📊

Atypical pattern

Further genetic counseling and testing recommended

⚠️ When to Consult a Doctor:

If results are ambiguous or do not align with clinical presentation, consult a geneticist or pediatrician for further evaluation.

Limitations

  • ⚠FISH detects only targeted chromosomes, not full karyotype
  • ⚠May not detect mosaicism or structural abnormalities

Risks & Considerations

  • ●Minor pain or bruising at the blood draw site
  • ●Very low risk of infection

Interfering Factors

  • ●Hemolysis in sample
  • ●Improper sample storage
  • ●Contamination

Frequently Asked Questions

What is the FISH postnatal gender confirmation test?
It is a genetic test that uses fluorescence in situ hybridization to detect X and Y chromosomes in a newborn's blood sample to confirm gender.
How accurate is the FISH test for gender confirmation?
The FISH test is highly accurate and reliable for detecting sex chromosomes, providing conclusive gender confirmation.
What is the cost of the FISH postnatal gender confirmation test?
The test costs INR 6000 at DNA Labs India, with free home sample collection available.
Is home sample collection available for this test?
Yes, DNA Labs India offers free home sample collection across many cities in India.
What sample is required for the test?
5 mL of whole blood collected in a Green Top (Sodium Heparin) tube is required.
How long does it take to get results?
Results are typically available within 4 days after sample collection.
Is the test safe for newborns?
Yes, it is a safe and non-invasive test involving a standard blood draw.
When is this test recommended?
It is recommended for ambiguous genitalia, gender reversal, or for personal confirmation of a newborn's gender.
Can this test detect gender-related genetic disorders?
It can help identify issues like Y chromosome abnormalities, but for comprehensive disorder diagnosis, additional tests may be needed.
How should I prepare for the test?
Ensure the requisition form is filled correctly, and no special preparation like fasting is required for the newborn.
What if the test results are inconclusive?
If results are ambiguous, consult a geneticist for further evaluation and possible additional testing.
Is the test covered by insurance?
Coverage varies by insurance provider; check with your insurer for specific details.
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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✓ DPDP Act Compliant: Under the Digital Personal Data Protection Act 2023, you can request deletion of your records at any time by contacting support.

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