Infant Formula Supplemented With Probiotic Microorganisms and/or Prebiotic.

Inclusion Criteria:

• Healthy term infants of both sexes, born in natural labor .
• Single birth.
• Full term infants (born between the 37th and 42nd week of gestation)
• Infants with birth weight >2500 g.
• Recruitment age will be 0-21 days.
• Infants whose mothers are unable to breast feed or have chosen not to breast feed prior to the study enrollment.
• Infants whose parents have agreed to participate in the study up to the age of 9 months..
• Infants whose parents have agreed to remain exclusively on the same product for 16 weeks of age..
• Infants whose parents have signed the informed consent form.
• Infants whose parents are able to understand the protocol requirements and to fill out the infant's diary and agree to completely fill out the parents' questionnaires during the period Of 9 months

Exclusion Criteria:

• Twins.
• Premature or low birth weight (< 2500 g).
• Chromosomal abnormalities or congenital malformation.
• Suffering jaundice which require phototherapy.
• Proven or suspected family history of allergy to cow's milk.
• Having been treated with antibiotics or other drugs during the last three days or more prior to the commencement of the study.