What is a common expected finding in a 39-week neonate?

The presence of one artery and one vein in the umbilical cord is considered a common expected finding at 39 weeks of gestation. Typically, a normal umbilical cord contains two arteries and one vein. However, the presence of a single umbilical artery (SUA) occurs in approximately 1% of singleton pregnancies and can be seen in full-term neonates. While it is often not associated with significant issues, it can sometimes indicate potential congenital anomalies, which is why healthcare providers monitor such findings.

Other choices may represent variations or conditions that are less common or not expected in a neonate at this stage. For instance, skin changes may vary in their blanching properties, toe responses can indicate neurological status, and plantar creases are generally assessed for development rather than being strictly indicative of a common finding at this gestational age. Hence, the presence of one artery and vein specifically aligns with the known occurrences during this point in gestation and is why it is considered a common expected finding.