The minimum birth weight, which is considered the norm, starts at 2 kg 600 g. Children born with less weight are considered to be lightweight, regardless of whether they were born on time or are premature.
If the birth weight exceeds 4 kg, the baby is considered large. Thus, the fluctuation in the rate of birth weight is 1 kg 400 g.Any deviation from normal weight is not too good, but it happens quite often. In practice, the weight of newborns can vary by almost half. Therefore, the answer to the question of how much a baby should weigh at 3 months depends, first of all, on its birth weight.
Weight gain dynamics
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It is easy to calculate that a baby who was born with a weight of 2600 grams, according to pediatric standards, will weigh a little more than 5 kg (2600–260 + 700 + 1000 + 1000). A baby whose birth weight was 4000 grams can weigh about 6500 g at 3 months (4000–400 + 700 + 1000 + 1000). But weight gain rarely goes according to plan. Small children often add faster than those born large. The rate of increase depends on what kind of feeding the baby is (breast or artificially), on the quality of the mother’s milk. The health of the infant itself also affects this process.
Colic, dysbiosis, SARS and, in general, any ailments interfere with weight.Parental unrest
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With parenting experience comes calm. Over time, any reasonable parent understands that it is not so important how much a child should weigh at 3 months or a year. It is important how he feels, how developed, what he is accustomed to.