Which statement made by a client at 39 weeks of gestation should alert the nurse to a potential complication?

The statement indicating "I have pain in my upper right abdomen" is particularly concerning, as it may suggest a serious complication such as liver issues, which can be associated with conditions like HELLP syndrome or preeclampsia. During the late stages of pregnancy, especially around 39 weeks, any new or unusual abdominal pain should prompt further evaluation, as it can indicate potential risks to both the mother and the fetus.

In contrast, lower back pain is common in late pregnancy as the body prepares for labor, and fetal movements, while sometimes concerning in quantity, usually are within normal limits as long as there are no other distressing symptoms. A slight headache, while it can also be a symptom to monitor, especially regarding preeclampsia, doesn't raise the same immediate level of alarm if it is described as bearable and not accompanied by other symptoms like visual disturbances or sudden swelling. Therefore, the upper right abdominal pain stands out as an urgent issue requiring further assessment.