We will use ultrasound (with 2D, 3D, image of pulmonary textures and Doppler technique that allow us to study the blood vessels of the lung) and magnetic resonance (standard sequences and advanced sequences that allow us to study the blood perfusion of the lungs). In addition, the function of the lungs will be tested, studying how they respond while we give oxygen (with a mask) to their mother for 10 minutes.
Finally, some lung proteins will also be analyzed in the laboratory. All this will allow: 1) to know how the RIC affects the development of the lungs, and 2) to improve imaging techniques that will allow us to better study the lung of babies inside the uterus.
The lung of small fetuses will be studied using imaging techniques safe for the baby such as ultrasound or MRI. Blood will also be collected from the umbilical cord and some proteins that are made in the fetal lungs and that serve to know how the lung is developing will be measured.