PRIMARY SEX XHARACTERISTICS= the body structures(ovaries, testes, and external genitalia) that make sexual reproduction possible.
SECONDARY SEX CHARACTERISTICS= nonreproductive sexual traits, such as female breasts and hips, male voice quality, and body hair
SPERMARCHE= the first ejaculation
MENARCHE= the firsts menstrual period
INTERSEX= condition present at birth due to unusual combinations of male and female chromosomes, hormones, and anatomy, possessing biological characteristics of both sexes.