One-month milestones outlined on charts detailing stages of child development include egocentrism and the ability to respond to voices, Metropolitan Community College explains. Three-month milestones include lessened crying and elevated attention spans that last as long as 15 minutes.
Additional one-month milestones include an average weekly weight gain of 5 to 6 ounces and the ability to wrap fingers around an object placed on the palm, Metropolitan Community College reports. Other one-month developmental milestones include the ability to differentiate tastes and momentarily regarding objects.
Two-month milestones include the ability to recognize people at a distance, the capacity to pay attention to faces and improved motor control, the Centers for Disease Control and Prevention notes. At this developmental stage, the infant may also start smiling at people, turn the head towards sounds and become fussy or cry when activities do not vary.
Six-month milestones include an average weekly weight gain of 3 to 5 ounces, improved eye-hand coordination and the ability to laugh out loud, Metropolitan Community College reports. At this age, the child may also chew and bite, grip objects for a maximum of 30 seconds, transfer objects from one hand to the other, use an increasing number of consonants, and fear strangers.
Because children learn and grow at differing rates, child development charts should only be used as guides, warns Metropolitan Community College.