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So Many Comments, So Little Time

Raynard Kington, acting director of NIH, said last week that the agency had received more than 20,000 comments on its proposed stem cell guidelines and now the number of comments is thought to be even higher, reports Science Insider. One concern expressed in the comments sifted through thus far include that the ethical requirements of the draft guidelines will prohibit the use of many existing human embryonic stem cell lines, including the ones approved by the Bush Administration. The final policy will be issued by July 7th.

The Scan

Pig Organ Transplants Considered

The Wall Street Journal reports that the US Food and Drug Administration may soon allow clinical trials that involve transplanting pig organs into humans.

'Poo-Bank' Proposal

Harvard Medical School researchers suggest people should bank stool samples when they are young to transplant when they later develop age-related diseases.

Spurred to Develop Again

New Scientist reports that researchers may have uncovered why about 60 percent of in vitro fertilization embryos stop developing.

Science Papers Examine Breast Milk Cell Populations, Cerebral Cortex Cellular Diversity, Micronesia Population History

In Science this week: unique cell populations found within breast milk, 100 transcriptionally distinct cell populations uncovered in the cerebral cortex, and more.