Which condition is characterized by severe headaches and visual changes during pregnancy?

The condition characterized by severe headaches and visual changes during pregnancy is preeclampsia. Preeclampsia typically occurs after the 20th week of gestation and is associated with high blood pressure and signs of damage to other organ systems, often the kidneys or liver. Severe headaches and visual disturbances, such as blurred vision or temporary loss of vision, are common symptoms that can indicate worsening of the condition and the potential for more serious complications.

Identifying preeclampsia is crucial, as it can lead to eclampsia, which involves seizures and poses more severe risks to both the mother and the fetus. While gestational hypertension does involve high blood pressure, it does not necessarily include the additional symptoms such as severe headaches and visual changes that are hallmark signs of preeclampsia. Cholestasis primarily affects the liver during pregnancy, leading to itching and other symptoms, but is unrelated to headaches or visual disturbances. Thus, preeclampsia is the most accurate answer based on the symptoms described.