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Reference ranges for SBP and DBP between 12 and 40 weeks gestation in the full cohort with complete data (nulliparous N = 4718; multiparous N = 5609) and in normal pregnancies only (nulliparous N = 3372; multiparous N = 4132). Centiles are labelled. A normal pregnancy was defined as one in which the woman did not have essential hypertension, preeclampsia, existing or gestational diabetes and delivered an appropriate-for-gestational-age sized infant at term.
