Date	Event	Description
30 June 2015	New search has been performed	Search and methods updated. We included a new comparison to assess the effects of vitamin D + calcium + other vitamins and minerals versus other vitamins and minerals (but no vitamin D + calcium). We also moved adverse effects to primary outcomes.
30 June 2015	New citation required and conclusions have changed	Nine trials included for this update. The few trials that reported on the effects of vitamin D supplementation during pregnancy on low birthweight and preterm delivery suggest a lower risk on these outcomes with vitamin D in a single or continued dose. However, this result should be interpreted with caution due to the small number of trials and included pregnant women. Also, the quality of the evidence was low in most studies, with high heterogeneity.
10 May 2012	Amended	Error in 'Plain language summary' corrected: "Data from three trials involving 463 women show a trend for women who receive vitamin D supplementation during pregnancy to less frequently have a baby with a birthweight below 2500 grams than those women receiving no treatment or placebo".