July 12, 2010 -
PRLog -- 1. Weight: the weight of baby boy is about 7.52 kg, and the weight of baby girl is about 6.87 kg.
2. Length: the length of baby boy is about 65.46 cm, and the length of baby girl is about 63.88 cm.
3. Head circumference:
the baby boy's is about 42.30 cm, and the baby girl's is about 41.20 cm.
4. Chest measurement:
the baby boy's is about 42.68 cm, and the baby girl's is about 41.60 cm.
5. Sitting height: the baby boy's is about 42.72 cm, and the baby girl's is about 41.56 cm.
6. Action development:
the 4 months baby's skill to do the movements is skilled position than before, and it appears of symmetry. When you hold up the baby in your arms, the child's head can be firmly standing up. When prone position, the baby can left their head up as the height of shoulders with a 90 degrees. And while take something, their thumb are more flexible than before. Legs can help support the body immediately.
7. Tooth eruption: some children have to grow 1-2 front teeth.
8. Language development:
the children during this period with a rapid development of language and emotional exchanges. The baby will laugh out loud when they feel happy, and the sound is clear and melodious. When someone talk to them, they would rattle the cuckoo's voice, as if in dialogue with you. At this point the developing of child's salivary glands, saliva out of mouth often, it also appears to suck their fingers in mouth defects.
9. Sensory development:
4 months baby began to developed a sense of things around the them and have more interest in people who like to play with. They Can recognize his mother and faces are familiar with, and the toys often play with.
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