At one point, if someone was sterile, they couldn't have children. There was nothing that could be done. Not anymore. Now doctors can provide them with another option called in vitro fertilization. Not only that, but biomedical engineers have advanced this field to an even greater extent. They can use genetic manipulation to prevent certain genetic diseases such as asthma and muscular dystrophy, and even greatly reduce the chances of rampant diseases in family history, such as breast cancer. One such way is the "three parents" idea. Reproductive surgeons will use the mother's egg, but replace the disease-containing mitochondria with second, healthy mitochondria from a different mother, for a total of three parents. By contributing to the genetics of offspring, scientists are designing a new possibility: tailor-made children. These would be completely "personalized" children. Manipulation of eye color, hair color, facial structure, height, size, and numerous other changes are all possibilities. This is a modern field of medicine that covers new horizons. However, these designer babies present important ethical questions. People have the feeling that scientists are taking full control of nature and that limits are being exceeded that should not be exceeded. For example, a scientist wanted her child to look like her, so she implanted an embryo and had a baby with blond hair and blue eyes, just like she wanted, but it should be genetically impossible. This research into a child's design should be regulated; it is ideal for preventing devastating diseases that will worsen a human's future life but completely controlling a child's appearance and perhaps his or her personality, while possible, should be illegal in the United States. According to the American Pregnancy Association in...... middle of paper ......typically prevent mitochondria from converting food into energy and are the result of genetic abnormalities, although some cases may be caused by exposure to toxins. These diseases can also affect the child's ability to see or hear. Many people are concerned about how this procedure will affect both parents and children. But an Oregon researcher, Shoukhrat Mitalipov, performed the mitochondrial procedure in monkeys and said it is ready to be tested in humans (Tavernisse, Sabrina). “Every time we get closer to genetic tweaking to promote health, it's exciting and scary,” said Dr. Alan Copperman, director of the division of reproductive endocrinology and infertility at Mount Sinai Medical Center in New York. “People are afraid that it will turn into a new, dystopian world.” Enabling the plan for a child with three parents will help create a healthier future.