Structural defects as consequence of late intrauterine constraint: craniotabes, loose skin, and asymmetric ear size.

Those fetal structures that are normally marked by passive growth in response to neighboring tissues show the effects of extrinsic deforming forces in distinctive ways. An appreciation for the mechanisms of deformation in these structures allows for more accurate clinical diagnosis, provides guidance for prognostic counseling and treatment, and may help eliminate unnecessary testing in the newborn period.