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In the process, the nucleus of an egg is inserted into the cytoplasm of an egg from a donor female which has had its nucleus removed, but still contains the donor female's mtDNA. The composite egg is then fertilized with the male's sperm.
The mitochonria in the sperm cell that power its motion are in the Mid-Peice which drops of once the head of the sperm has penetrated the ovum. This means that all the mitochonria and therefore all the mitochondrial DNA comes form the mother ovum. So it is true that the mother contributes more DNA to a baby than the father. It is comonly known that the Nucleic DNA (DNA in the nucleus) in a human baby is half Paternal and half Materna. This is because each Chromosome in our genome has a partner that is very similar to it but with denes coding slightly different. Onc chromosome comes from the father and the other from the mother.