Correia et al. (40) reported a patient with a dual-allele mutation (c.113-10C>G) in the NDUFB7 intron, which resulted in a significant decrease in NDUFB7 protein function and reduced complex I activity, leading to fetal intrauterine growth restriction, anemia, postpartum hypertrophic cardiomyopathy, and severe lactate acidosis. The gene discussed is NDUFB7; the disease is anemia (phenotype).