This study looks at how common certain antibiotic-resistant bacteria (called extended-spectrum beta-lactamase-producing Enterobacteriaceae, or E-BLSE) are in pregnant women who experience premature breaking of their water before full term. The goal is to understand how often these bacteria are found, how long they stay, and what factors increase the risk of carrying them. This information will help doctors choose the best antibiotics to protect both the mother and baby from infections during and after pregnancy. The study follows women from the time of their membrane rupture until delivery, collecting samples to track the bacteria over time.

Inclusion Criteria :

• Pregnant women aged over 18 years
• Diagnosed with premature rupture of membranes before term (between 23 weeks + 0 days and 36 weeks + 6 days of gestation)
• Managed in one of the participating maternity hospitals

Exclusion Criteria :

• No available microbiological sample
• Minors or women under legal guardianship (curatorship, tutelage, or judicial protection)
• Women who refuse the use of their clinical data for research purposes at admission or within one month after receiving the information document

The study participants will be selected from pregnant women who experience premature rupture of membranes before term (between 23 weeks and 36 weeks + 6 days of gestation). These women will be receiving care at multiple maternity hospitals participating in this multicenter French study. The population includes adult women (over 18 years old) who have vaginal microbiological samples available for analysis. This group represents a high-risk pregnancy population due to the increased risk of infection associated with premature membrane rupture.