8-cell human embryo, 3 days after fertilization Multiple embryos are created and preimplantation genetic diagnosis is used to detect and select ones that are free of a genetic disorder and that are also a HLA match for an existing<unk>  who requires a transplant. Upon birth, umbilical cord blood is taken and used for hematopoietic stem cell transplantation.
Savior sibling
Feral child
Poster child
Birth attendant
Ben's Friends
Fisherman's Friend
Standard person
Women on Waves