The goal of this clinical trial is to determine whether a fennel-water infusion taken by mothers reduces colic in breastfed infants. The study will also assess the effect of the fennel infusion on the mothers' milk and the gut microbiota of the infants. The main questions it aims to answer are: * Does a fennel-water infusion taken by mothers reduce colic in breastfed infants? * What changes occur in the gut microbiota of responders (participants whose infants show reduced colic symptoms after the intervention)? Researchers will evaluate changes in the microbiota of breast milk and the stool of breastfed infants after the mothers consume a fennel infusion. Participants-mothers of infants-will: * Take 1 L of fennel infusion daily for 7 days. * Keep a diary of infant colic symptoms, including time spent crying, and periods of fussiness or irritability without a definite explanation. * Provide breast milk and infant stool samples before treatment (day 0) and at the end of treatment (day 7) for analysis of microbial communities.
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Proportion of participants with a ≥50% reduction in daily crying duration as measured by a parent-reported 24-hour diary.
Timeframe: One week
Changes in bacterial community of infant stool samples
Timeframe: One week