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
The Shane Twins Assault member attacked them. On January 18, 2007, WWE announced that they had released the twins. The Shane Twins The Shane Twins (born December 21, 1967) are a professional wrestling tag team that consist of twin brothers Mike and Todd Shane. They were best known for their appearances in World Wrestling Entertainment (WWE) as Gymini. After being trained at the Malenko School of Wrestling in Tampa, Florida, The Shane Twins debuted in the Florida based IPW Hardcore Wrestling in 1998 managed by Sir Ronald J. Niemi IV. They were originally known as "Biff Wentworth" (Mike) and "Chaz Wentworth" (Todd), collectively