Monitoring of fetal heart rates is an extremely vital practice that is utilized throughout the world both in homes and clinical settings. It is crucial for an expectant mother to have access to fetal heart rate monitoring whenever she receives medical treatment during her pregnancy. As a result, it is imperative that such technology is comfortable, easy to use, and accurate. Dr. Kristen Naegle, a researcher in the Biomedical Engineering department at Washington University in St. Louis, began to identify shortcomings in the current fetal heart rate monitoring technology when she was pregnant with her two twins. The primary concern of Dr. Naegle came from how the nurses were constantly needed to re-position the ultrasound probes in an effort to accurately obtain both fetal heart rates. This can lead to severe discomfort for the expectant mother as well as put the safety of the fetus in severe danger. Because of her concerns, Dr. Naegle strongly believes that a more efficient method for fetal heart rate monitoring, that is safe and comfortable for both the mother and fetus, is possible. In an effort to begin to solve this problem, Dr. Naegle partnered with a team of seniors in the department of Biomedical Engineering at Washington University to create a Fetal Heart Rate Monitoring Array that meets needs of both patients and health care professionals.