Effect of Infant Formula Intake on Infant Growth From 0 to 6 Months.

Inclusion Criteria: * 0 to 3 weeks * Infants whose mothers do not wish or can not breastfeed for personal or medical reasons * Child followed by a general practitioner or pediatrician * Informed consent form signed by the legal representatives of the subject * Commitment of legal representatives to follow the constraints generated by the study * Insured Exclusion Criteria: * Nursing mother * Infant born prematurely before 37 weeks of amenorrhea * Child allergic to cow's milk proteins * Pathological pregnancy (hypertension, infection, gestational diabetes, etc.); * Chronic or acute illness (metabolic or neuromuscular diseases, epilepsy, asthma, diabetes, digestive, renal, cardiac or haematological diseases); * Incapacity for the legal representative(s) to understand or adhere to the protocol * Mother smoking or vapoting during pregnancy; * Subject involved in another clinical study or in an exclusion period from another study * Legal representatives deprived of liberty * Legal representatives in a position to judicial protection * Weight of the subject according to age and sex, not included between the 3rd and the 97th percentile of the WHO Child Growth Standards * Subject height according to age and sex, not between the 3rd and the 97th percentile of the WHO Child Growth Standards * BMI of the subject according to age and sex, not included between the 3rd and the 97th percentile of the WHO Child Growth Standards * Head circumference of the subject according to age and sex, not included between the 3rd and the 97th percentile of the WHO Child Growth Standards