Scientists stunned by discovery of 'semi-identical' twins

Boy and girl, now four, are only the second case of ‘sesquizygotic’ twins recordedA pair of twins have stunned researchers after it emerged that they are neither identical nor fraternal – but something in between.The team say the boy and girl, now four years old, are the second case of semi-identical twins ever recorded, and the first to be spotted while the mother was pregnant.Continue reading...
Source: Guardian Unlimited Science - Category: Science Authors: Tags: Reproduction Biology Health Science Children Source Type: news