Final answer:
An infant can typically raise its head when placed on their abdomen by about two months of age. Developmental milestones like this are important to track as they indicate the child's progress. If there are delays, particularly past four months, parents should discuss with a pediatrician.
Step-by-step explanation:
An infant should be able to raise its head when placed on the abdomen at around two months of age. Initially, this milestone appears as the baby holding their head erect and steady when in an upright position. By the end of the fourth month, they can lift their head 90 degrees while lying prone. As part of their developmental milestones, infants also develop other skills such as rolling from front to side, sitting up with support, and eventually achieving near-adult vision by six months. Parents and caregivers should observe their child's progress, as babies generally have the ability to hold up their head at six weeks old, and most should reach this milestone between 3 weeks and 4 months old.
It is important to track these milestones as they are indicators of normal development. If an infant is not holding up their head by four months, it may signal a developmental delay. This underscores the value of monitoring and, if necessary, seeking early intervention practices.