Image of Female Mouse Embryos With and Without COUP-TFII (image) NIH/National Institute of Environmental Health Sciences Share Print E-Mail Caption The normal female mouse embryo (top) contains only the female reproductive tract, highlighted in pink. The female mouse embryo without COUP-TFII (bottom) has both male, in blue, and female reproductive tracts. Credit NIEHS Usage Restrictions For use in media coverage of the press release only. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.