Table 4 Age of achievement for milestones

Roll over (weeks)

n = 30 9 (2–28)

n = 2 27.5 (25–30)

n = 9 8 (4–10)*

n = 1 25

n = 21 10 (2–28)*

n = 1 30

Sit up unaided (months)

n = 29 13 (7–40)

n = 5 10 (6–28)

n = 11 11 (7–18)*

n = 2 8 (6–10)

n = 18 15 (9–40)*

n = 3 15 (7–28)

Pull up in a standing position (months)

n = 24 16.5 (9–72)

n = 10 15 (6–57)

n = 6 12.5 (9–18)*

n = 4 11 (6–16)

n = 18 18 (11–72)*

n = 6 17 (7–57)

Walking unsupported (months)

n = 28 22.5 (14–57)

n = 17 19 (6–393)

n = 12 18 (14–30)

n = 5 12 (6–16)

n = 16 23.5 (15–57)

n = 12 30.5 (7–393)

Speak first words (months)

n = 25 14 (9–60)

n = 11 15 (6–86)

n = 6 15.5 (10–30)

n = 6 14 (6–44)

n = 19 13 (9–60)

n = 5 15 (7–86)

Speak two-word sentences (months)

n = 19 30 (18–72)

n = 16 19.5 (6–86)

n = 6 24 (20–45)

n = 6 14 (6–44)

n = 13 36 (18–72)

n = 10 24 (7–86)

Fully toilet trained during the day (years)

n = 10 4.5 (3–10)

n = 27 3.5 (0.5–32)

n = 3 4 (3–4)

n = 7 3.5 (0.5–8)

n = 7 5 (4–10)

n = 20 4 (0.5–32)