Intra-amniotic infection is the most frequent known cause of spontaneous preterm birth, a serious public health problem owing to the high morbidity and mortality associated with premature babies, in addition to the high economic and social costs of their care. By collaborating with industry in this project, we intend to contribute to the improvement of the detection of the risk of inflammation and/or intra-amniotic infection in women with threatened preterm labor through the validation of a non-invasive test (on vaginal discharge) , motivated by the subsequent positive impact that this would bring as a non-invasive procedure.