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Updated: Jul 7, 2026

Derivation of Human Embryonic Stem Cells by Immunosurgery
Published on: December 13, 2007
Human embryonic stem cell derivation from poor-quality embryos
Paul H Lerou1, Akiko Yabuuchi, Hongguang Huo
1Division of Newborn Medicine, Brigham & Women's Hospital, Boston, Massachusetts 02115, USA.
Abstract:
During in vitro fertilization, embryos deemed clinically useless based on poor morphology are typically discarded. Here we demonstrate a statistical correlation between the developmental stage of such poor-quality embryos and the yield of human embryonic stem (hES) cell lines. Early-arrested or highly fragmented embryos only rarely yield cell lines, whereas those that have achieved blastocyst stage are a robust source of normal hES cells.
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