While physical developmental milestones are often some of the easiest to observe, the early years of a child's life are also marked by other developmental milestones, including social and emotional ones. (verywellmind.com)
About half of parents believe that children are capable of self - control and other developmental milestones much earlier than they actually are. (zerotothree.org)
However, the habit of nursing should not hinder other developmental milestones, for example weaning. (newkidscenter.com)