维生素D是人体重要的营养素，在妊娠女性中普遍缺乏，孕期维生素D缺乏与妊娠期糖尿病、子痫前期、妊娠丢失、早产、小于胎龄儿等多种不良母儿结局相关，众多研究试图通过补充维生素D来预防相关并发症。但由于研究人群和试验设计的不同，孕期维生素D水平与母儿结局的相关性以及补充维生素D是否可以改善相关结局，目前均无统一结论，本文将对此进行综述。“,”Vitamin D is an important nutrient in the human body. Vitamin D deficiency is common in pregnant women, which is associated with a variety of adverse maternal and newborn outcomes, such as gestational diabetes mellitus, preeclampsia, pregnancy loss, preterm delivery, and small for gestational age infants, etc. There are a large number of studies on the Vitamin D supplementation for prevention of pregnancy-related complications. However, there has been no consensus on the association of Vitamin D levels during pregnancy with maternal and newborn outcomes, and effectiveness of vitamin D supplementation in prevention of related complications due to different study trial designs and in different populations. This article reviews the research progress on Vitamin D level during pregnancy and its association with maternal and newborn outcomes.