Colonization with Group B Streptococcus During Pregnancy

Inclusion Criteria: Healthy pregnant women, adults (≥ 18 years and under 45 years). Before/during week 13 of gestation. Signing of informed consent. Exclusion Criteria: Multiple pregnancy. Fetal complications. History of premature delivery/miscarriage in the second trimester. Significant maternal medical complications. HIV-positive. Women who are immunocompromised (for example, patients with cancer and transplant who are taking certain immunosuppressive drugs, patients with hereditary diseases that affect or could affect the immune system). History of significant gastrointestinal disease (e.g., prior gastrointestinal resection, current diarrhea, inflammatory bowel disease). Heart failure and cardiac medical history (e.g. artificial heart valve, medical history of infective endocarditis, rheumatic fever or cardiac malformation). Use of other probiotics during the current pregnancy. Uncertainty of the investigator regarding the willingness or capacity of the participant to comply with the requirements of the protocol.