'Greedy' gene press (IMAGE) St. John's College, University of Cambridge Caption Image showing the signalling cells (in green) of the mouse placenta that are key for remote controlling the metabolism of the mother to support nutrient supply and growth of the fetus. Credit Sferruzzi-Perri lab Usage Restrictions Only to be used in media coverage associated with this specific news story License Original content 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.