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June 1, 1909 

Alexander Maximow, a Russian academic, lectures at the Berlin Hematological Society and presents a theory that all blood cells come from the same ancestor cell. This presents the idea that blood stem cells are multipotent.

1953

Maine scientist Leroy Stevens finds pluripotent cells while performing cancer research on mice. 

1956

Dr E Donnall Thomas performs first successful bone marrow transplant between a patient who has leukemia and their identical twin.

1960

Researchers discover that bone marrow contains haematopoietic stem cells that form all the blood cells in the body and stromal stem cells which form bone, connective tissue, cartilage, and fat

1978

Blood stem cells are found in human umbilical cord blood.

1968 

British scientist Robert 
Edwards and his student, Barry Bavister, are the first to fertilize a human egg in the test tube which marks the start of vitro fertilization technology. 

1995

Scientists from the University of Wisconsin derive the first embryonic stem cell lines from primates. 

1989

Preimplantation genetic diagnosis(PGD), a method where a single stem cell can be isolated from an IVF embryo to screen for genetic diseases, is developed.

1981

Dr. Evans from the University of Cambridge and Dr. Martin from the University of California, San Francisco derive pluripotent embryonic stem cells from the embryos of mice. 

1998

James Thompson leads scientists at University of Wisconsin to isolate and grow the first stem cells from human embryos, which were created using IVF.

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