What does a Doppler scan measure in pregnancy?

A Doppler scan during pregnancy primarily measures blood flow, specifically assessing the hemodynamics between the uterine arteries and the placenta. This non-invasive technique utilizes sound waves to evaluate the speed and direction of blood flow, which can provide critical information regarding placental perfusion and overall fetal well-being.

Assessing blood flow from the uterine arteries to the placenta is essential in identifying potential complications such as placental insufficiency, which can affect fetal growth and health. The Doppler scan can help healthcare providers make informed decisions regarding the management and monitoring of the pregnancy.

While other options concerning the size, shape, or implantation site of the placenta and fetal heart rate patterns are important in pregnancy monitoring, they do not fall under the specific measurements taken with a Doppler scan. The underlying emphasis of the Doppler assessment is primarily on blood flow dynamics, establishing its role in evaluating vascular conditions during pregnancy.