Do young girls always ovulate during their periods?

Young girls do not typically ovulate during their periods. Ovulation usually begins a few years after a girl's first period, which is known as menarche. During the first few years after menarche, a girl's menstrual cycles are often irregular and ovulation may not occur every month. It can take several years for a girl's menstrual cycle to become fully regular and for ovulation to occur consistently.