If you are talking about humans, a girl can reproduce after she begins menstruating. Boys can begin reproducing after they reach puberty.
In boys and girls, the bodies become developed. That is the reproductive systems become mature and capable of reproduction.
reproduction
All organisms are capable of growth, reproduction, responding to stimuli, and adapting to their environment in order to survive.
Asexual reproduction
In both girls and boys, there are different physical changes. But in both, the bodies become sexually mature and capable of reproduction.
Going through puberty is the process in which children mature into adults. This means that you have become sexually mature and capable of reproduction.
Can a convicted felone become a juvenile probation officer.
Sea stars are capable of both types of reproduction.
Asexual
In girls and boys, both become fertile and capable of reproduction. There is hair growth in the pubic region, under arms, etc.
No. They reproduce sexually.
Maturity, I suppose.