Check this site.
Thank you for your reply but i'm still not sure what the answer is. what would your answer be to this question? It mentions baby biography not ''baby diary''.
No. According to the above site:
"The first detailed scientific study of child development was probably Charles Darwin's Biographical Sketch of an Infant (1877), based on a log he had kept on the development of his eldest child. In this work, Darwin advanced the hypothesis that each individual's development from birth to adulthood parallels or recapitulates the phylogenetic development of the human species as a whole (he had made a similar observation about the development of the fetus). Darwin's ideas influenced the early study of child development, also known as the child study movement."
What does your text say about Darwin comparing human and animal infant behavior?
It mentions ethology, another biologically oriented theory, and it points to the evolution of humans within the animal kingdom. It was heavily influence by the 19th-century work of Charles Darwin.