{"id":"5b6fd6eaec90438646b382104c9f2845","slug":"developmental-milestones-and-growth-expectations-from-birth-through-6-months-of","question":"developmental milestones and growth expectations from birth through 6 months of age","answer":"The first six months bring remarkable changes across movement, fine motor skills, senses, language, and social connection—though every baby moves through them at their own pace, which is completely normal.\n\nFor weight, expect steady gains: from birth to 3 months, babies typically gain 150–200g (5–7 oz) per week, and most double their birth weight by 4–5 months. From 3–6 months, the pace slows to about 100g (3–4 oz) per week. For length, babies grow roughly 25 cm (10 in) over the whole first year, starting from an average of 50 cm (20 in) at birth. What matters most is that your baby stays on their own growth centile—not which centile, just consistency.\n\nDuring these months, you'll notice your baby grasping, babbling, and connecting with you in new ways. If something feels off to you or growth slows to below 100g per week in the first three months, or drops across two percentile lines on the growth chart, chat with your pediatrician.\n\nEvery baby's timeline is genuinely different, and your instinct matters—mention any concerns at checkups.","sources":"[{\"pmid\":\"mlp_infantandnewborndevelopment.html\",\"title\":\"Infant and Newborn <span class=\\\"qt1\\\">Development</span>\",\"journal\":\"NIH MedlinePlus\",\"year\":\"2026\",\"url\":\"https://medlineplus.gov/infantandnewborndevelopment.html\",\"score\":0.74},{\"pmid\":\"27453856\",\"title\":\"Validity and reliability of the developmental assessment screening scale.\",\"journal\":\"Journal of family medicine and primary care\",\"year\":\"2016\",\"url\":\"https://pubmed.ncbi.nlm.nih.gov/27453856/\",\"score\":0.78}]","thread_json":null,"view_count":0,"created_at":"2026-08-19T09:43:53.657Z"}