Which finding indicates a positive sign of pregnancy that should be documented by the nurse?

The presence of fetal heart tones (FHT) detected with a Doppler is a definitive indicator of pregnancy. This finding reflects active fetal development and confirms the presence of a viable pregnancy, typically audible around 10 to 12 weeks of gestation. The ability to hear FHT is a critical sign that contributes to the overall assessment of both maternal and fetal health during pregnancy.

While other options may suggest potential signs of pregnancy, such as a missed menstrual cycle or a positive urine test, they are not as conclusive as identifying FHT. The last menstrual cycle being two months ago might indicate a missed period, but it does not confirm pregnancy on its own. A positive pregnancy test is a strong indicator but is still a biochemical confirmation, as opposed to a direct observation like FHT. Braxton Hicks contractions are irregular and can occur throughout pregnancy; however, they do not serve as a positive sign of pregnancy. In contrast, the audible fetal heart tones provide tangible evidence of the developing fetus within the uterus, warranting documentation by the nurse.