Final answer:
The health-care provider ordered blood tests for Jeni, who presented with flu-like symptoms during pregnancy, to diagnose potential infections like listeriosis due to the consumption of raw milk, which could pose risks to her and her unborn child.
Step-by-step explanation:
The health-care provider is concerned about Jeni's symptoms because while they are typical of the flu, they could also be indicative of other infections that may be harmful to both her and her unborn child. High fever, fatigue, and muscle aches in a pregnant woman require careful consideration due to the potential risks to the pregnancy and the altered immune response during pregnancy. The mention of consuming raw milk raises the concern for infections like listeriosis, which can be particularly dangerous during pregnancy and lead to complications. It is imperative to diagnose and treat any potential infection promptly to ensure the health of both Jeni and her fetus. Therefore, the health-care provider has ordered a blood sample to be tested to identify the cause of her symptoms and prescribe the correct treatment.