Conclusion
In summary, vasa previa results in poor pregnancy outcomes if not
diagnosed prenatally. Ultrasonography, specifically transvaginal scan
with color Doppler is commonly utilized as diagnostic method. We have
presented a series of cases with suspected but inconclusive
ultrasonography diagnosis of vasa previa. MRI was applied to further
detect the existence of vasa previa and achieved satisfied results that
confirmed by pathology examination. Therefore, when inconclusive
ultrasonography results come in such cases, MRI may offer some
assistance in diagnosis.