Prenatal Vitamin A Deficiency Tied to Postnatal Asthma (image) Columbia University Medical Center Share Print E-Mail Caption Vitamin A deficiency during fetal development can lead to excessive growth of smooth muscle surrounding the airways, making the lungs overly reactive to stimulation from the environment later in life and thus at risk to develop asthma. In these cross-sectional images of the lungs of embryonic mice, the dark stains represent smooth muscle. The left image is from a mouse whose mother was fed sufficient vitamin A, while the right image is from a mouse whose mother was fed insufficient vitamin A. Credit Lab of Wellington V. Cardoso, M.D., Ph.D./Columbia University Medical Center Usage Restrictions May use only in the context of this news story 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.