Not enough evidence to determine if giving women vitamin C during pregnancy helps prevent babies dying, being born too soon or being born small.
Having a low intake of vitamin C may be associated with complications in pregnancy such as pre-eclampsia, anaemia and having a small baby. The review of trials found that there is not enough good evidence to say if supplementing women with vitamin C during pregnancy prevented the baby dying or being born small. Vitamin C supplementation was associated with a moderate increase in the risk of preterm birth, although further research is required. Vitamin C supplementation may help to prevent women developing pre-eclampsia during their pregnancy, although more research is needed.