Karyotyping is an important genetic analysis that studies the number and structure of chromosomes in our cells. Chromosomes are the “packages” that carry genetic information (DNA), and each individual normally has 46 chromosomes organized into 23 pairs. Any deviation from this number or change in their structure may be associated with health or reproductive problems.
This analysis is usually performed using a blood sample, but in specific cases it can also be performed using other types of cells (e.g., during pregnancy, from amniotic fluid or chorionic villi). The sample is analyzed in a specialized laboratory, where the chromosomes are visualized and examined in detail to identify any abnormalities.
This analysis helps identify:
Why is it recommended? Karyotyping is recommended to identify chromosomal abnormalities that may affect fertility, pregnancy outcomes, or the development of the child. It is an important diagnostic and preventive tool in reproductive and genetic medicine.
It is recommended in cases of:
Why is it important? Karyotyping is an essential step in understanding the causes of many problems related to reproduction and development. It helps with:
What are the types of karyotype tests? Karyotype testing can be performed in different ways, depending on the purpose of the analysis and the patient's age group. The type of sample collected is determined by the reason for performing the test. Blood test: This is the most commonly used method for karyotyping. A blood sample is collected from a vein. Amniocentesis: This procedure involves collecting a sample of the amniotic fluid surrounding the baby in the uterus. This fluid contains fetal cells that can be analyzed. It is usually performed between the 15th and 20th weeks of pregnancy
How is the karyotype test performed? The karyotype testing process involves several important steps, from sample collection to receiving the final result: Sample Collection: The procedure begins with collecting a blood sample from a vein. In specific cases, prenatal samples (amniotic fluid) may be used. Sample Transport: The sample is placed in specialized tubes and transported to a specialized laboratory under controlled conditions (appropriate temperature and time). Result Interpretation: The results are reviewed by genetics specialists, who prepare a detailed report on the findings and their clinical significance. Receiving the Result:The result is usually available within 40–50 business days.
The test is recommended for individuals or couples who have fertility problems, recurrent miscarriages, a family history of chromosomal abnormalities, or when a genetic disorder is suspected.
In cases of infertility or recurrent miscarriages, a physician may recommend testing both partners, as some chromosomal changes may be present in the parents without causing symptoms.
Yes. Some individuals may have balanced chromosomal changes that do not cause health problems but may affect fertility or increase the risk of genetic problems in their children.
An abnormal result does not always mean that an active disease is present. The result is interpreted by a medical geneticist, who may recommend additional tests or genetic counseling.
No. Karyotyping detects large changes in the number and structure of chromosomes, but it does not identify most small mutations in individual genes. Other, more specific genetic tests are required to detect these changes.
Karyotyping is a diagnostic test that analyzes chromosomes, whereas NIPT is a screening test performed during pregnancy that assesses the risk of certain chromosomal abnormalities using fetal DNA found in the mother's blood.
Yes. Karyotyping analyzes the sex chromosomes (XX or XY), thereby determining the chromosomal sex of the fetus when performed as a prenatal analysis.
Yes. It may be recommended during family planning, particularly for couples with a history of infertility, recurrent miscarriages, or genetic diseases in the family.
Some abnormalities may be inherited from the parents, while others may occur randomly during the formation of reproductive cells or during embryonic development.
Yes. Interpretation of the result by a genetics specialist helps ensure an accurate understanding of the findings and determine the appropriate next steps.
