Infertility is often due to poor egg quality, or chromosomal damage. Some of this damage may occur in the egg's mitochondria, the cell's powerhouse. A new procedure seeks to replace mitochondria in old eggs with fresher mitochondria to improve egg quality. However, some doctors say there haven't been enough studies to know if the procedure is either safe or effective. Experts discuss.
Scientists have discovered that older research animals can seemingly be made young again with infusions of young blood which reactivate stem cells. Researchers have started to isolate factors in plasma that appear to be responsible, opening the door to possibly rolling back the clock on aging. Experts explain.