What Are the Developmental Milestones for a 6-Month-Old Baby?
Aug 15, 2021
Source: Cainiu Health
Dr. Ding Hongfang
Introduction
Developmental milestones for a 6-month-old baby:
- The baby can roll over repeatedly.
- Begins grasping small objects and tapping them on tables.
- Frequently produces consonant-like syllables.
- Starts showing stranger anxiety—for example, may become upset when held by unfamiliar people.
- Gradually learns to distinguish between edible and non-edible items.
- Awake periods begin to lengthen.
- With the introduction of complementary foods, the baby may experience constipation or diarrhea.
For 6-month-old boys, the average height ranges from 61.4 to 75.8 cm, weight from 5.97 to 11.72 kg, and head circumference from 39.8 to 47.7 cm. For 6-month-old girls, the corresponding ranges are: height 60.1–74.0 cm, weight 5.64–10.93 kg, and head circumference 38.9–46.5 cm. At this age, when attracted by toys, infants can roll over repeatedly, begin grasping small objects and tapping them on tables, and frequently produce consonant-like syllables.
At this stage, infants start exhibiting stranger anxiety—for instance, they may become distressed when held by unfamiliar people but show pleasure when held by their mothers. They gradually learn that some items are edible while others are not. Although infants still tend to put objects into their mouths to chew or explore them orally, consistent parental guidance helps them understand which items are unsafe to eat.
Awake periods lengthen at this age, so parents should engage more frequently in interactive play with their baby. Bowel movements remain relatively irregular; as complementary foods are introduced, infants may experience either constipation or diarrhea.
