Question: what happens to blood pressure during period?
Answer: Blood pressure was higher at the onset of menstruation than at most other phases of the cycle (systolic blood pressure, P less than 0.05; diastolic blood pressure, P less than 0.001). Adjusted diastolic blood pressure was higher in the follicular than in the luteal phase (mean difference 1.23 mmHg, P less than 0.001).