If a significant amount of red blood cells cannot be returned, the donor may not donate for 56 days, just as if they had donated a unit of blood.

如果大量的红细胞不能返回的话，那么捐献者在56天之内不能再捐献，就像他们已经捐献了一单位的血一样。

youdao

I heard donating your placental blood doesn't cost anything, and I thought I'm not going to keep it, and if I donate it I can save someone. And the stem cells can be stored.

我听说捐赠脐带血不用花钱，我想因为我也不保留它，如果捐出去可以救人，也可以保存干细胞。

youdao

Or maybe I could donate bone marrow and those stem cells could be given to other people in the same way that blood can be given to other people by matching and making sure that immunologically my cells were compatible with you; there's a lot of interest in that.

或者我可以捐献骨髓,而那些干细胞,可以使用和输血同样的方法,通过配型来确认我的免疫细胞和你的匹配,从而把我的干细胞,输入给你,这里面有很多有趣的东西

耶鲁公开课 - 生物医学工程探索课程节选