The Story of Masha and Dasha The new mother was told that her twin babies had died after birth. However the truth was far different: they were sent to an institute near Moscow to be studied. This was to be the fate of "Masha" and "Dasha", one of the most unusual sets of "Siamese" or conjoined twins ever born. Identical twins are formed when a fertilized egg divides into two eggs. The two eggs grow into two babies that are identical in every respect. Conjoined or Siamese twins