Final answer:
Walking is the paramount milestone for comforting parents about their child's atypical development, usually occurring by the end of the first year. All children develop differently, but delays in milestones like sitting, crawling, and walking can be addressed through early intervention.
Step-by-step explanation:
The largest milestone that humans overcome, which can provide comfort to parents regarding their child's atypical development, is walking. Typically, children start to walk by the end of the first year. The process begins with sitting, crawling, and eventually standing with support. While these milestones are averages, it's important to remember that all children develop at their own pace, and some may reach these milestones slightly earlier or later than others.
Parents can find comfort in the fact that motor development occurs in a universal sequence, including sitting independently by around 7 months and walking with or without help by their first birthday. Issues with motor development, such as delays in sitting, crawling, or walking, can often be addressed through early intervention programs. It's essential for parents to observe their child's development and consult with a pediatrician if they have concerns.
Motor development is closely monitored because it is intertwined with cognitive growth and general health. Babies who show delays across several milestones may need further evaluation, but reaching each milestone provides an opportunity for reassurance and recognition of the child's progression.