Ants reproduce their young ones sexually although some studies support that some species of ants produce asexually or a combination of sexual and asexual reproduction.
Usually, in a colony of ants, there are three groups system; the queen, workers and males. Only the queen can mate and reproduce. Although in some colonies, there are also a group of fertile females that can mate too. The workers are sterile whereas the males mate with the queen, fertilize her eggs and die afterwards.
When the queen lays her eggs, they mature from egg to larvae and pupa until they develop into ants with wings. New queens are born too. They fly away with their wings and a new queen mates with one of the males. This is called "nuptial flight". Then she settles in a new place, loses her wings, makes her own colony and the cycle continues.