Final answer:
Puberty is the period of sexual development that leads to the ability to reproduce.
Step-by-step explanation:
The period of sexual development that usually leads to the ability to reproduce is puberty. Puberty is the stage of development at which individuals become sexually mature. It is characterized by the maturation of the reproductive systems and the development of secondary sex characteristics, which support reproduction. Hormones released from the hypothalamus, anterior pituitary, and gonads are responsible for these changes.