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
Carlson Twins regularly featured on the HGTV program, "Deserving Design", with Vern Yip. Kyle's primary role on the program involved carpentry. Lane is the executive director of Sunflower Children, which he founded with Helena Houdová, and in 2010 he promoted awareness of autism at a charity event, Sea Paddle NYC. Carlson Twins Kyle and Lane Carlson (born December 24, 1978) are identical twin brothers known as the Carlson Twins. The Carlson twins work together as male fashion models. The twins were born in Stillwater, Minnesota, United States, Kyle six minutes after Lane. The Carlson twins grew up with two older siblings, Aaron