Main findings of this study
PPH
PRETERM BIRTH, EARLY PREGNANCY
In this randomized, placebo-controlled trial, 1000 IU/day cholecalciferol during pregnancy in women with an early pregnancy 25(OH)D of 25–100 nmol/l did not alter the gestational age at delivery or the incidence of preterm birth. However, our findings suggest that antenatal vitamin D supplementation might be effective at reducing the need for an instrumental delivery and as a result the associated risk of PPH.