this is the operational process: The marrow is removed through a hollow surgical needle inserted several times into the iliac crest (back of the pelvic bone). All donors receive either general or regional anesthesia. The typical donation procedure can last from 45-90 minutes. Since marrow constantly regenerates itself, the donor's system will replace the extracted marrow completely within several weeks.
and the recovering: Following the procedure, donors can expect to feel some soreness in the lower back for a few days or longer. Some donors have also reported feeling fatigued and having some difficulty walking.
the info was taken from: http://www.marrow.org/DONOR/
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