- I have found out, Swift, my Guardian-Angel, that my mother's ovums were defective. It's because of hereditary mitochondrial disease. Nuclear material of my mother's ovum was transplanted into healthy donor's ovum (from which its own nuclear material was extracted). But there is more to come. Some segments of DNA were replaced by the segments of DNA of other people and even other beings. Maybe animals. Once the doctors knuckled down they wanted to make something special of me. With the best features. So, they replaced what they wanted. Of course, it was by agreement of my parents. And now my mother is afraid that I inherited something terrible from my parents-donors. That's why she was not glad for my gift, but began to worry. - Tetiana explained to her unicorn Swift.