Final answer:
A high fever postpartum, especially when combined with symptoms such as abnormal vaginal discharge or abdominal pain, is most indicative of a postpartum infection and requires immediate medical attention.
Step-by-step explanation:
The most indicative finding of a postpartum infection would be a high fever, particularly when combined with other symptoms such as abnormal vaginal discharge, malaise, or abdominal pain. While fever alone can be a normal part of the postpartum period, when it is persistent and particularly when it is high or combined with other signs of infection, it raises concerns for conditions like endometritis or wound infections. A high fever can suggest the body is fighting an infection, which in the postpartum period can be very serious and requires prompt medical attention. Other signs to look for include foul-smelling lochia (vaginal discharge after birth), pain around a cesarean section incision site or where the placenta was attached, and subinvolution of the uterus (where the uterus does not return to its normal size).