"Do no harm"
Starving the baby or withholding food is doing harm. At this point you provide palliative care until the death of the baby. If the parents decide to "pull the plug" then they can do it, but as the doctor thats not your choice.
Is this basically just a "maintain quality of life" kind of question?
During end-life care, priority is given to improving the patient's comfort. FA20-pg272
submitted by โmedulla(35)
lethal chromosomal defect - > he is going to die -> maintain comfort