To participate in a lethal injection is to occupy the medical role and use medical training for a purpose that is not part of the goals of medicine and that harms the recipient of treatment.
Refusal of pediatric euthanasia can be considered iatrogenic insofar as it inadvertently prolongs patient suffering, but attitudes differ cross-culturally.
AMA J Ethics. 2017;19(8):802-814. doi:
10.1001/journalofethics.2017.19.8.msoc1-1708.
When a pregnant woman is knowingly causing harm to her unborn child, there are various legal interventions that can be taken to protect the rights if the fetus.