Fetal blood karyotype enables the detection of possible numerical and structural chromosomal abnormalities of the fetus. It is performed in late pregnancy, after the 20th week of gestation.
Indications for prenatal karyotyping are:
- Maternal age >35 years
- Abnormal biochemical or ultrasound findings
- Previous child with a chromosomal abnormality
- Parent carrier of a balanced chromosomal rearrangement
- Abnormal findings in non-invasive prenatal testing (NIPT)
Culture of fetal blood lymphocytes and chromosome analysis using G-banding technique. Subsequent detailed microscopic analysis and chromosome pairing allows the detection of numerical and structural chromosomal abnormalities of sex and autosomal chromosomes.
Sample type: Cord blood sample in dry heparin tubes (vacutainer with LITHIUM HEPARIN – GREEN lid)
Turnaround time: 1 week