Principal component analysis (IMAGE) Hunter Medical Research Institute Caption This graph shows the differences in gene expression in the uterus amongst the different groups. NOTE – The two largest ovals represent the gene expression at term and the cluster of smaller ovals show gene expression preterm. Credit Phung et al. Usage Restrictions May be used in reporting on this study. 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.