• Are there any risks to the fetus during the procedure?

The procedure involves amniocentesis, a routine medical process with very minimal risks that will be discussed with your physician beforehand.

• Does the FISH test replace other genetic screenings?

FISH is used as a rapid supplementary test; doctors may still recommend a full Karyotype to confirm other genetic details.

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Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

A precise laboratory test performed on amniotic fluid samples for rapid detection of numerical abnormalities in chromosomes 13, 18, 21, X, and Y to assess fetal genetic risks.

Purpose of the Procedure

Rapid detection of Down syndrome (Trisomy 21).
Identification of Edwards syndrome (Trisomy 18) and Patau syndrome (Trisomy 13).
Screening sex chromosomes for conditions like Turner or Klinefelter syndromes.

Advantages of FISH Technology

High speed in obtaining results compared to traditional cell culture.
High accuracy in identifying numerical abnormalities of targeted chromosomes.
Providing early information to assist in appropriate medical decision-making.

What to Expect During the Procedure?

A small amount of amniotic fluid is withdrawn using a fine needle.
The procedure is performed under ultrasound guidance to ensure fetal safety.
The sample is immediately sent to the genetic lab for chromosome analysis.

What is included?

✓Amniotic fluid collection (under medical supervision)
✓Laboratory FISH chromosome analysis
✓Detailed genetic result report

Conditions and notices

Fasting is not required
The test is typically performed between weeks 15 and 20 of pregnancy
Requires specialist physician approval and genetic counseling

Frequently Asked Questions

Short answers to the FAQs published with this service.

• What is the difference between FISH and traditional Karyotyping?

FISH is much faster (usually within 48 hours) and targets specific chromosomes, while Karyotyping examines all chromosomes and takes up to two weeks.

• How soon can I expect the FISH test results?

Results are typically available within 24 to 48 hours after the sample reaches the laboratory.

• Does the FISH test require fasting or special preparation?

Fasting is not required; however, you must coordinate with your doctor for the scheduled amniocentesis procedure.

• How accurate is this test for detecting Down syndrome?

Service resources and references

References and additional resources

Reference material and files associated with this service when available.

Scientific references

American College of Medical Genetics (ACMG)
Mayo Clinic Laboratories

Ensure Your Baby's Genetic Health

About this service

Purpose of the Procedure

Advantages of FISH Technology

What to Expect During the Procedure?

What is included?

Conditions and notices

Frequently Asked Questions

References and additional resources

Scientific references

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