On the other hand, the umbilical cord is not part of the human body, so cord blood donation causes no pain and the risk is low. The only danger is that if it's all donated to others, you will need luck to find a match if one day you need it for yourself.
相對而言，臍帶本就是人體的「身外之物」，臍帶血捐贈沒有任何痛苦，風險最低，唯一的風險只是，若完全捐出去，自己日後萬一要使用，就得憑運氣去配對了。