Sweden Phases Out KUB Test Amid Concerns Over Expanded Prenatal Screening

Sweden is undergoing significant changes in prenatal testing standards, with several regions set to phase out the KUB test by 2028 due to new EU regulations. The KUB test, a combination of ultrasound and blood analysis, has been the first-line screening method but will gradually be replaced by the more accurate Non-Invasive Prenatal Testing (NIPT) in many areas. Regions like Halland and Värmland are considering this transition, while Gävleborg already offers NIPT to all pregnant women.

NIPT analyzes fetal DNA through a blood sample, providing a higher accuracy rate for detecting common chromosomal abnormalities such as trisomy 21, 13, and 18. However, unlike KUB, NIPT is more costly, and neither test offers definitive diagnoses, only risk assessments. Alexandra Van Damme shared her experience of KUB causing anxiety due to a false alarm for trisomy 13 and 18; she stated that access to NIPT would have alleviated her stress during the waiting period.

Despite this shift, experts raise concerns over the proliferation of expanded NIPT panels offered by private providers, which test for over 100 chromosomal abnormalities beyond the well-studied three. Genetic counselor Charlotta Ingvoldstad Malmgren and professor Bo Jacobsson criticize these wide-ranging tests as unscientific and potentially harmful, citing false positives that lead to unnecessary invasive procedures with miscarriage risks. A survey indicated increased usage of such extended tests in 14 out of 21 regions, generating anxiety and costly follow-ups within the public healthcare system.

Ylva Carlsson from Sahlgrenska University Hospital noted a lack of confirmed positive results from the extended panels, highlighting concerns about overdiagnosis. Companies marketing these tests maintain they are screening, not diagnostic, and emphasize informing patients about uncertainties.

Michaela Granfors, chair of the obstetric ultrasound working group, commented that the future standard in Sweden is likely to be a combination of detailed ultrasound and targeted NIPT screening.

Overall, Sweden is balancing efforts to improve prenatal screening accuracy while addressing the ethical and medical challenges posed by increasingly broad testing options, aiming to reduce anxiety and unnecessary procedures for expectant mothers.