Antenatal Vitamin D Supplementation in an at risk pregnant population (dark skinned/veiled), looking at neonatal vitamin D levels in cord blood.

INTERVENTION: The treatment arm will be given 2000 international units (IU) of cholecalciferol orally daily commencing between 14 and 18 weeks gestation. Vitamin D levels will be checked again at 28 weeks gestation. If still deficient the dose will be doubled to 4000IU orally daily until birth. Follow up will cease at six weeks postnatally but vitamin D supplements will need to be taken indefinitely. CONDITION: Vitamin D Deficiency in at risk Pregnant women. PRIMARY OUTCOME: Incidence of Vitmain D deficiency in a high risk population as determined by screening vitamin D blood test at recruitment. Vitamin D level >75 in neonates. As determined by cord blood assays of vitamin D at birth. SECONDARY OUTCOME: Vitamin D level >75 in women. As determined by maternal blood assays of vitamin D at birth. INCLUSION CRITERIA: At risk women ‐ dark skinned ‐ veiled Anyone with vitamin D deficiency that has not commenced treatment prior to recruitment.