noun
infancy; babyhood
Refers to the developmental stage of a human infant, typically from birth to around one year old. Often used in medical, psychological, or educational contexts. Compare with 幼児期 (early childhood).
See also: 幼児期
乳児期の栄養は、その後の成長に大きく影響する。
Nutrition during infancy greatly affects subsequent growth.
乳児期に適切な
It is important to provide appropriate stimulation during babyhood.