Official title and information are available only for Plus and Premium subscribers.
Patent Pending Embryonic stem cells (ES cells) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage preimplantation embryo.[1][2] Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells.
To see the additional information details please login and subscribe to a Plus or Premium account.
