What positive sign of pregnancy would the nurse expect to find in the medical notes of a client?

The auscultation of fetal heart sounds is considered a positive sign of pregnancy because it indicates the presence of a developing fetus. This finding typically occurs around the 10 to 12 weeks of gestation and is a clear indicator that the pregnancy is progressing normally.

While the positive result on a home urine test and visualization of the fetus through sonography are evidences of pregnancy, they are classified differently in clinical terms. Home urine tests detect the hormone hCG, which can indicate pregnancy but is not as definitive as a clinical assessment. Visualization of the fetus with sonography is also a strong indication but occurs later in the pregnancy and is not something that would be regularly noted in all medical notes. Similarly, palpable fetal movement is a sign of fetal activity that generally occurs later in the pregnancy, typically around 20 weeks or more, but isn't an initial positive sign of pregnancy.

Therefore, the auscultation of fetal heart sounds uniquely identifies the physiological development of the fetus and is a standard positive sign referenced in medical records.