Their mother was told that her daughters had died soon after their birth. They were removed from their mother's custody at birth to be studied by Soviet physiologists. Maria and Daria ('Masha and Dasha') Krivoshlyapova (Мария и Дарья Кривошляповы 3 January 1950 – 17 April 2003) were Ischiopagus tripus conjoined twins from Russia.
