Babyhood
Part of speech: noun
Definition: The state or period of infancy.
Infancy
Part of speech: noun
Definition: The earliest period of childhood (crawling rather than walking).The state of being an infant.An early stage in the development of, eg, some technology.The state of being a minor.
Example sentence: My obsession with accumulation, which at times has taken on the whisper of a psychic illness - as anyone who has experienced the ode to the Collyer brothers that is my 'Vogue' office will concur - began in infancy.