Baby month 21: language scaffolding
50+ words common. Following 1-step instructions.
What's typical at 21 months
50+ words common. Following 1-step instructions. For the complete picture across all 24 months including red-flag thresholds, see the complete milestones pillar.
Sleep at month 21
Sleep patterns at month 21: 1-2 naps per day, 11-14 hours total. Individual variation is wide.
Feeding at month 21
Family table integration. Cow's milk OK after 12 months.
See pillar for detailed milestones. Remember: wide normal range, individual variation, trajectory matters more than dates.
Red flags for month 21
"Loses skills they once had" is always a red flag. By 24 months: doesn't use 2-word phrases, doesn't copy actions, doesn't follow simple instructions. Call Early Intervention (free in US until age 3) for any concern. No referral needed.
Track month 21 with Wermom App
Milestone checklists + red-flag alerts + sleep and feeding patterns
Try Wermom App free