cheaper, perhaps.
所有跟贴·加跟贴·新语丝读书论坛
送交者: steven 于 2011-09-06, 11:10:38:
回答: One thing I don't understand about this AI procedure is 由 蓝隼 于 2011-09-06, 10:50:42:
All donors have to be screened for HIV or other STD, and some genetic defects. These tests cost a lot. I guess it is certainly cheaper to use the donors who have already been through the screening.
所有跟贴:
加跟贴