Craniopagus twins conjoined twins develop inutero remains unclear. Embryologists have traditionally attributed identical twinning as "splitting or fission" of either the inner cell mass of pleuripotential cells or early embryonic disc at 13–14 days of gestation just before the primitive streak. Some theorists suggested that conjoined twins develop as a result of the failed fusion of a single fertilized ovum. However a new hypothesis suggests that cranial fusion occurs between two separate embryos before the end of the 4th week of gestation. This can happen because the cranial neuropore is still open, which is responsible for the ultimate fusion and formation of
Les Twins routine was a homage to Les Twins’ work. Les Twins’ dance style is often categorized as New Style hip-hop, a commercial form of hip hop with a strong emphasis on isolations and musicality. However, the twins are known for having created a unique style from this dance which they refer to as "Twins-Style". Due to their ability to anticipate and finish each other’s moves, the brothers quickly gained a reputation for their timing and skill at making freestyle dance look like choreography. Charlotte Guillemin of "WAD Magazine" wrote: Larry and Laurent credit their major inspirations as Michael Jackson, their coach