Your baby at twenty-one weeks.

Your baby's personality is fully on show now, with strong opinions, a sense of humor, and clear affection. Here is what is normal.

Feeding

Still milk-led and settled, breast or bottle, with solids about to begin if you are starting at six months. If you plan baby-led weaning, read up and prepare soft, graspable first foods, soft cooked vegetables, ripe fruit, and strips that fit in a fist.

Sleep

Sleep varies widely: some babies are on a reliable two or three nap pattern and sleep well, others still wake often, and both are within normal.

Diapers

Steady output, soft stools the reassuring sign.

Growth

Strength is building fast, rolling both ways with ease, pivoting to reach toys, and pulling forward on the forearms in a proto-crawl. Babbling is rich and varied, and your baby may imitate sounds you model clearly and repeatedly.

This week's leap

Affection shows as reaching toward you, patting your face and leaning toward favorite people. Play imitation games, tongue out, mouth wide, clapping, and add finger-play songs that mix language, rhythm and movement. Re-check the home for low hazards as mobility grows.

From three months, 101.3°F (38.5°C) or above warrants assessment, and ear infections are common at this stage, especially with older siblings or nursery. Thick, colored nasal discharge beyond ten days with fever can mean a sinus or ear infection. Raise no interest in reaching or grasping by five to six months. For you, breastfeeding raises your nutritional needs, so keep iron, vitamin D and calcium up. None of this is medical advice; every baby is different, and your midwife, health visitor or doctor is the person to ask about your own child.

The calm way to follow all of this is to log it in one tap as it happens, then read the pattern over a few days rather than carrying it in your head. Little Bean shows this same week-by-week guidance inside the app, beside your own baby's log.

Quick answers: 21 weeks

How often should a 21-week-old eat?

Most babies this age take 5 to 7 milk feeds in 24 hours. Feed on demand rather than by the clock; steady weight gain and enough wet diapers are the real signs intake is fine.

How much sleep does a 21-week-old need?

Roughly 14 to 15 hours across day and night. 3 naps, wake windows of 2 to 2.5 hours. The range is wide, so treat these as averages rather than targets.

What are typical wake windows at 21 weeks?

3 naps, wake windows of 2 to 2.5 hours. An overtired baby fights sleep harder, so watch the clock and the tired signs together.

Milestone reference: CDC developmental milestones, 4 months checklist.

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