Authors' response

[摘要] We agree that our study lacked power to look at the relationship between bacterial vaginosis in early pregnancy and preterm birth. It was originally designed to look at the relation between bacterial vaginosis and miscarriage before 16 weeks' gestation.1 However, when we found that few women diagnosed with bacterial vag-inosis were being treated, we extended the follow-up period to look at preterm birth.

[学科分类] 卫生学