Parasitic twin Parasitic twin A parasitic twin (also known as an asymmetrical or unequal conjoined twin) is the result of the processes that also produce vanishing twins and conjoined twins, and may represent a continuum between the two. Parasitic twins occur when a twin embryo begins developing in utero, but the pair does not fully separate, and one embryo maintains dominant development at the expense of its twin. Unlike conjoined twins, one ceases development during gestation and is vestigial to a mostly fully formed, otherwise healthy individual twin. The undeveloped twin is defined as parasitic, rather than conjoined, because it is incompletely
The D'Ambrosio Twins The D'Ambrosio Twins Bianca D'Ambrosio and Chiara D'Ambrosio (born April 28, 2005), also known collectively as the D'Ambrosio Twins, are American child actresses and musicians. The twins made their acting debut playing Summer Newman on the soap opera "The Young and the Restless". At the age of 6, Bianca and Chiara began starring together and separately in TV, films, print, music, and video projects. The twins were born in Los Angeles, California. In 2008 at the age of 3, the twins were cast in the role of Summer Newman on the soap opera, "The Young and the Restless" on CBS.