The normal female mouse embryo (top) contains only the female reproductive tract highlighted in pink. The female mutant mouse embryo without COUP-TFII (bottom) develops as intersex that has both male (blue) and female reproductive tracts. This material relates to a paper that appeared in the 18 August 2017, issue of Science, published by AAAS. The paper, by F. Zhao at National Institute of Environmental Health Sciences in Durham, NC, and colleagues was titled, "Elimination of the male reproductive tract in the female embryo is promoted by COUP-TFII in mice."
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