In the context of pregnancy, how is hypertension defined?

Hypertension during pregnancy is defined using specific thresholds to determine when a patient's blood pressure is concerning enough to warrant further investigation or intervention. The correct definition for hypertension in this context is a systolic blood pressure greater than 140 mmHg or a diastolic blood pressure greater than 90 mmHg. This classification aligns with guidelines used in obstetric care, recognizing that elevated blood pressure in these ranges can pose health risks to both the mother and the developing fetus.

Understanding this definition is crucial for early detection and management of conditions such as gestational hypertension and preeclampsia, which can have significant implications for maternal and fetal health. The other options represent definitions used for general hypertension in a non-pregnant population and may not account for the specific physiological changes that occur during pregnancy.