Final answer:
Pregnant women should promptly report the sudden onset of visual disturbances to their primary care provider as it may be a sign of a serious condition called preeclampsia.
Step-by-step explanation:
Pregnant women should promptly report the sudden onset of visual disturbances to their primary care provider. Visual disturbances, such as blurred vision, flashing lights, or loss of vision, can be a sign of a serious condition called preeclampsia. Preeclampsia is a potentially dangerous condition that affects pregnant women and is characterized by high blood pressure and damage to organs such as the liver and kidneys. Prompt medical attention is important to protect the health of the mother and the baby.