Vitamin D status and its predictive factors in pregnancy in 2 Australian populations.

Background: High prevalence rates of suboptimal vitamin D levels have been observed in women who are not considered 'at risk'. The effect of behavioural factors such as sun exposure, attire, sunscreen use and vitamin D supplementation on vitamin D levels in pregnancy is unknown.

Aim: To determine prevalence and predictive factors of suboptimal vitamin D levels in 2 antenatal clinics in Australia--Campbelltown, NSW and Canberra, ACT.