Final answer:
A young female chicken that has not started laying eggs is called a pullet.
Step-by-step explanation:
The term for a young female chicken that has not yet begun egg production is called a pullet. A pullet is a female chicken that is less than one year old and has not started laying eggs. The process of beginning to lay eggs in chickens is comparable to the onset of puberty in humans, where a female's ovaries start to mature eggs for reproduction. In chickens, this typically occurs around the age of 16 to 24 weeks, though the timing can vary depending on the breed and individual development of the bird.