Abby and Brittany Hensel Abby and Brittany Hensel Abigail Loraine Hensel and Brittany Lee Hensel (born March 7, 1990) are American dicephalic parapagus twins; also known as conjoined twins. They are highly symmetric for conjoined twins, giving the appearance of having a single body without marked variation from normal proportions. Each has a separate heart, stomach, spine, pair of lungs, and spinal cord. Each twin controls one arm and one leg. As infants, learning to crawl, walk and clap required them to cooperate. They can eat and write separately and simultaneously. Activities such as running, swimming, hair brushing and driving a car require coordinated
Monoamniotic twins Monoamniotic twins Monoamniotic twins are identical twins that share the same amniotic sac within their mother’s uterus. Monoamniotic twins are always identical, always monochorionic and are usually termed Monoamniotic-Monochorionic ("MoMo" or "Mono Mono") twins. They also share the placenta, but have two separate umbilical cords. Monoamniotic twins develop when an embryo does not split until after formation of the amniotic sac, at about 9-13 days after fertilization. Monoamniotic triplets or other monoamniotic multiples are possible, but extremely rare. Other obscure possibilities include multiples sets where monoamniotic twins are part of a larger gestation such as triplets, quadruplets, or more. Monoamniotic