If the virus is active during pregnancy, it usually spreads to vital tissues of a developing fetus. (sciencedaily.com)
Scientists would have an infinite supply of eggs for cloning vital tissues or organs and conducting fertility research — without needing human donors. (discovermagazine.com)
Once the stem cells reach a state of exhaustion that imposes a limit on their own lifespan, they themselves gradually die out and steadily diminish the body's capacity to keep regenerating vital tissues and cells, such as blood. (newscientist.com)