corporisfabrica: Two competing theories seek to explain the rare phenomenon of conjoined twins. The first and oldest theory is known as fission, in which the first cell divisions of the fertilised egg do not result in complete separation of the twins

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corporisfabrica: Two competing theories seek to explain the rare phenomenon of conjoined twins. The first and oldest theory is known as fission, in which the first cell divisions of the fertilised egg do not result in complete separation of the twins

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