[Vitamin D and pregnancy].

Vitamin D insufficiency is characterized, since 2005, by 25(OH)D concentration less than 75 nmol/L (or 30 ng/mL). Vitamin D could interfere with many mechanisms involved in preeclampsia's pathogenesis including trophoblastic invasion and immunomodulation as well as blood pressure control and proteinuria. Occurrence of preeclampsia and gestational diabetes seems to be linked to vitamin D deficiency but recent data in the literature are contradictory. Vitamin D supplementation during pregnancy is controversial. Some societies consider it unnecessary and others recommend up to 2000 UI/d. There is no reported case of teratogenicity linked with vitamin D intake.