Main signs of postpartum infection include which of the following?

The main signs of postpartum infection include increased heart rate and chills, which indicate the body's response to infection. An elevated heart rate can be a physiological reaction to fever or systemic infection, often seen when the body is trying to combat pathogens. Chills may occur as a result of the body experiencing a rise in temperature or as a response to fever, which is also common in infections.

In the postpartum period, infections can arise from various sources, including the uterus (endometritis), surgical sites (incision infections), or urinary tracts. Recognizing these signs is critical so that appropriate interventions can be initiated promptly to prevent further complications for the mother.

While fever and excessive thirst might seem related to infection, the combination of increased heart rate and chills is more specific to the acute phase of infection. The other options describe symptoms that could be associated with various conditions, but they are not as definitive for identifying postpartum infections specifically.