[12] discovered that the individual embryonic stem cells (hESCs) expressed high degrees of telomerase activity, thus these cells even now preserved the developmental potential to create trophoblast and derivatives of most 3 embryonic germ layers even following undifferentiated … Continue reading [12] discovered that the individual embryonic stem cells (hESCs) expressed high degrees of telomerase activity, thus these cells even now preserved the developmental potential to create trophoblast and derivatives of most 3 embryonic germ layers even following undifferentiated proliferation in vitro for a long period