Which of the following is a common complication that pregnant women with mitral stenosis may face during pregnancy?

Pregnant women with mitral stenosis often experience increased blood volume demands due to the physiological changes that occur during pregnancy. This condition involves a narrowing of the mitral valve, which can restrict blood flow from the left atrium to the left ventricle. As pregnancy progresses, the body naturally increases blood volume to support the developing fetus, placing additional strain on the heart.

The heart must pump more blood to manage both the mother's and the fetus's needs, which can exacerbate symptoms in women with mitral stenosis. This leads to increased workloads on the heart and could result in complications such as heart failure or pulmonary edema if these demands are not adequately managed.

While other options might present challenges or concerns during pregnancy, the specific and immediate complication relevant to mitral stenosis is the increase in blood volume demands. Managing these demands is crucial to ensure the health and safety of both the mother and the developing baby.