Risk of spontaneous preterm delivery in a low-risk population: the impact of maternal febrile episodes, urinary tract infection, pneumonia and ear-nose-throat infections

In this low-risk population, ear-nose-throat infection in early pregnancy was associated with an increased risk of SPTD. However, infectious morbidity in later pregnancy was not. Thus, the link between maternal infection and preterm delivery may vary in different populations and health care settings.