Weaning to adult brain size. Long childhood in humans, as brain most complete growth outside the uterus due to inadequacy of birth canal size to accommodate an infant with a mature brain. A learning period. Puberty to full adult stature and sexual maturity. Hormonal changes, estrogen and testosterone.
Menarche indicates onset of puberty in girls with appropriate ritual celebration.
Steady state replacement of cells and tissues. For women in many cultures, most time occupied in child bearing and rearing. Also seems true in other primates. Foro men in many cultures activities include activities related to subsistence, religion, politics and family. There are biological and behavioral features of these stages in humans, such as a childhood with continued dependency.