Inclusion Criteria:  Pregnant women Age: > 35 years old BMI > 25 Women who have signed the informed consent to participate in the study. No intention to change their routine physical activity or usual dietary intakes throughout the study  Exclusion Criteria:  > 14 weeks' gestation Taking food supplements or probiotics History or current pathology that influence in the study With major fetal abnormalities Had used continuous antibiotic therapy for at least 3 months