Page "Preterm birth" Paragraph 46

Interventions that should have been initiated prior to pregnancy can still be instituted during pregnancy, including nutritional adjustments, use of vitamin supplements, and smoking cessation.

Calcium supplementation as well as supplemental intake of C and E vitamins could not be shown to reduce preterm birth rates.

Different strategies are used in the administration of prenatal care, and future studies need to determine if the focus should be on screening for high risk women, or widened support for low-risk women, or to what degree these approaches should be merged.

While periodontal infection has been linked with preterm birth, randomized trials have not shown that periodontal care during pregnancy reduces preterm birth rates.