Building your child’s future, together with "I Sarang".
The average weight of boys during this time is 7.0 to 7.9 kg, while girls are 6.4 to 7.3 kg. The height of boys is 63.9 to 67.6 cm, and the height of girls is 62.1 to 65.7 cm.
| Boy | Girl | |||
|---|---|---|---|---|
| Weight(kg) | Height(cm) | Weight(kg) | Height(cm) | |
| 4 months | 7.0 | 63.9 | 6.4 | 62.1 |
| 5 months | 7.5 | 65.9 | 6.9 | 64.0 |
| 6 months | 7.9 | 67.6 | 7.3 | 65.7 |
(Source: Korea Disease Control and Prevention Agency: 2017 Korean National Growth Charts for Children and Adolescents)
Babies can fully support the neck, allowing you to sit for short periods of time and lift the upper body up to the waist when lying face down. They can reach out and grab objects on their own and play with toys by holding them with both hands. They put everything they can get their hands on into their mouths and suck it, and start to roll over as soon as you put them down. They start building strength in their legs to lift themselves up and put force into their legs. At 6 months, they begin to slowly try to crawl.
They look around at things nearby and bring objects to their mouths. They show curiosity about things and try to reach for objects that are out of reach. They start passing the object from one hand to the other. They can follow moving objects by rolling their eyes left and right and recognize familiar people and objects from a distance. When looking in the mirror with their mother, they develop the ability to distinguish between your mother's reflection and their own face, making them really enjoy it.
They can laugh out loud. They respond to sound by making a sound. When babbling, they like to connect vowels ('ah,' 'eh,' or 'oh') and take turns communicating with their parents when making sounds. They respond to their own name and make sounds to express both pleasure and displeasure. They begin to say consonant sounds (or say meaningless sounds such as m or p).
When they are dissatisfied, they cry and when they are happy, they smile brightly. Like these, their emotional expressions become richer, and sometimes they even squeal with joy. They are responsive to other people's emotions and often appear happy. Shyness begins to develop, children begin to recognize family members' faces and recognize strangers, and they especially enjoy playing with their parents. Sometimes they smile when they look at themselves in the mirror, and sometimes their expression becomes tense when the environment changes.
(Source : Korea Disease Control and Prevention Agency: 2017 Korean National Growth Charts for Children and Adolescents, U.S. Department of Health and Human Services: Developmental Stages, Ministry of Health and Welfare: Parenting Guide for New Dads)