The main objective of this clinical trial is to collect human milk samples from 0 to 4 months after delivery in order to characterize human milk components. The secondary objectives of this study are:

1. To assess whether there is a correlation between human milk composition and mothers' diet
2. To assess whether there is a correlation between human milk composition and maternal clinical parameters
3. To assess whether there is a correlation between human milk composition and mother and infant clinical parameters

Inclusion Criteria:

• Between 18 and 40 years of age included at time of enrolment
• BMI before pregnancy between 19 and 29 included
• Having signed the Informed Consent Form
• Having decided to exclusively breast-feed until infant is 4 months old

Exclusion Criteria:

• Currently participating or having participated in another clinical trial during the last 4 weeks prior to the beginning of this study
• Presenting any disease or medical condition which might prevent breast-feeding or collection the human milk samples or for which breast-feeding is not indicated
• Presenting diseases/medical conditions such as diabetes, heart problems, abnormal conditions of pregnancy (ex. hypertension)
• Presenting dietary problems/illnesses such as anorexia, bulimia and celiac disease
• Assuming any medication indicated for the treatment of any metabolic or cardiovascular disease
• Cannot be expected to comply with the study procedures

Healthy mothers of any ethnicity having decided to exclusively breast-feed their new born baby from birth up to 4 months of age will be eligible to participate in the study.