Final answer:
A term newborn generally requires about 110 calories per kilogram per day in their first year. Given 68 Kcal/100 ml of breast milk and an intake of 850 ml, this amounts to around 578 Kcal/day for the infant. This is an average, and individual needs may vary.
Step-by-step explanation:
A term newborn should typically take in an estimated 110 calories per kilogram of body weight each day in the first year of life. For an average newborn weighing 3.4 kg, this amounts to about 374 calories per day. However, as breast milk is typically about 68 Kcal/100 ml, and a healthy baby may require up to 850 ml of milk daily, the total caloric intake would be approximately 578 Kcal/day. The mother's body is well-prepared for this with fat reserves accumulated during pregnancy, and she should ideally intake an extra 720 Kcal/day to fulfill the needs of lactation.
It's crucial to understand that these calorie requirements are based on averages and that the individual needs of newborns may vary. Some may require slightly more milk and calories, while others may require less. The exact caloric intake should always be discussed with and monitored by healthcare professionals.