4-D Scan of Fetus at 25 Weeks (image) Durham University Share Print E-Mail Caption This is a sequence showing a fetus at 25 weeks reacting to touch. The fetus opens its mouth after touching it with its hand. Credit Dr. Nadja Reissland, Durham University Usage Restrictions None 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.