What heart sound is typically heard when auscultating a client with cardiovascular disease during pregnancy?

In the context of cardiovascular changes during pregnancy, the correct heart sound that is often noted is a murmur. As blood volume increases significantly during pregnancy, typically there is a physiological adaptation that results in increased blood flow across the heart valves, which can lead to the development of benign heart murmurs. These murmurs, often described as "innocent," are common in pregnant individuals and usually present as a low-pitched sound, typically occurring in the left lateral decubitus position.

While gallops, clicks, and a regular heart rhythm can be factors in cardiac assessment, they are less commonly associated with the typical physiological adaptations to pregnancy. Gallops may indicate heart failure or volume overload, clicks are more often associated with valvular issues or prosthetic valves, and a regular heart rhythm doesn't denote any specific pathological or physiological change. Therefore, identifying murmurs is vital in understanding the cardiovascular dynamics during pregnancy, making it the appropriate answer in this scenario.