Background: Small observational studies have demonstrated that pre-eclampsia is associated with hypocalciuria.
Objectives: To compare urinary calcium excretion in pre-eclampsia, gestational hypertension, and chronic hypertension with that in normotensive pregnancies.
Search Strategy: Online databases were searched through February 2016 using medical subject headings "calcium homeostasis," "calcium excretion," "hypocalciuria," and "pre-eclampsia.