Fetal and neonatal alloimmune thrombocytopenia (FNAIT). (A) Magnetic resonance image (MRI) of a newborn girl with FNAIT caused by anti–HPA-3a. Note the large left occipital hemorrhage containing layering blood of different ages. Hemorrhage was identified on day of birth via ultrasound and confirmed on day of life 1 with MRI showing hemorrhage in the bilateral occipital lobes, left parietal lobe, and right temporal lobe. (B) Overview of the mouse model of FNAIT used by Farley et al. (C) Development of resilience to thrombocytopenia-induced ICH. Cartoons were prepared using adaptations of image vectors from Servier Medical Art (www.servier.com), licensed under the Creative Commons Attribution 3.0 Unported License (https://creativecommons.org/licenses/by/3.0).