Are twins a boy and a girl? Dragon and phoenix refers to a kind of twins that are pregnant with male fetuses and female fetuses at the same time. Because the dragon and phoenix in the symbols of male and female represent male and female respectively, they are called \”dragon and phoenix twins\”. However, not every pair of twins can be born, and the causes and gender ratio of twins are also topics of great concern. Causes of twins: There are many reasons for twins, one of which is more common.