Today, there are few milk banks in the United States, and they are usually run by nonprofit midwife groups that save milk for premature babies and critically ill infants. 目前,美國已經(jīng)擁有了為數不多的幾家母乳庫,它們大多由非牟利的助產(chǎn)婦組織經(jīng)營(yíng)運作,所募得的母乳主要用于喂養早產(chǎn)嬰兒以及病危孩童。