YTHDF2 and coronary artery disorder: To investigate the conservation of the BHPF-induced YTHDF2/m6A–ferroptosis axis, we examined the levels of key molecules in the placental tissue (infant side) across two groups: three representative cases from the CHD group with higher BHPF concentrations (2.50, 3.04 and 2.86 μg/L) and three representative cases from the control group with lower BHPF concentrations (0, 0.01 and 0.02 μg/L).