Ten studies have been conducted looking at whether gender dysphoria persists throughout childhood. On average 80% of children change their minds and do not continue into adulthood as transgender. Some of these studies are very old, the first being published in 1968 and others in the 1980s. This was during a time when being transgender was not accepted as widely in society as it is now so it can be argued that this may have influenced many to change their minds. An analysis of all published studies can be seen

However, the most recent study published in 2013 confirms once again that gender dysphoria does not persist in most children past puberty

Source : https://www.transgendertrend.com/children-change-minds/