41.   Doctors are not yet sure whether the children are identical or fraternal twins, but they have the same blood type.

42.   Fraternal twins are produced when the mother releases more than one egg and both are fertilized.

43.   Half were fraternal twins, who share half of their genes.

44.   Identical twins are genetic clones of each other, while fraternal twins are not.

45.   She said girls appear to be fraternal twins.

46.   The fraternal twins deliberately keep low profiles.