Which are characteristic of physical development of a 30-month-old child? (Select all that apply.)
a. Birth weight has doubled.
b. Primary dentition is complete.
c. Sphincter control is achieved.
d. Anterior fontanel is open.
e. Length from birth is doubled.
f. Left or right handedness is established.
ANS: B, C
Usually by age 30 months, the primary dentition of 20 teeth is completed, and the child has sphincter control in preparation for bowel and bladder control. Birth weight doubles at approximately ages 5 to 6 months. The anterior fontanel closes at age 12 to 18 months. Birth length is doubled around age 4. Left or right handedness is not established until about age 5.
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