A baby's first word often begins with the letter "d" because the sound of "d" is relatively simple to produce, as it is made by gently tapping the tongue against the upper teeth. Additionally, the sound "d" is common in many of the words that parents say to their babies, such as "dada" and "dog." This repetition and exposure to the sound may make it more likely for a baby to say a word that starts with "d" as their first word.





There is another theory that suggests that the reason why babies' first word often starts with "d" is because "d" is a very common sound in the babbling stage, which typically starts around 6 months of age. Babies naturally produce a wide variety of sounds during this stage, but "d" is one that they are able to produce easily, and