The Montgomery case in 2015 was a landmark for informed consent in the UK.
Nadine Montgomery, a diabetic woman and of small stature, delivered her son vaginally; her son experienced complications owing to shoulder dystocia, resulting in hypoxic insult with consequent cerebral palsy. Her obstetrician had not disclosed the increased risk of this complication in vaginal delivery, despite Montgomery asking if the baby's size was a potential problem.
Montgomery sued for negligence, arguing that, if she had known of the increased risk, she would have requested a caesarean section
The Supreme Court of the UK announced judgement in her favour in March 2015. It established that, rather than being a matter for clinical judgment to be assessed by professional medical opinion, a patient should be told whatever they want to know, not what the doctor thinks they should be told.
This ruling means that patients can expect a more active and informed role in treatment decisions, with a corresponding shift in emphasis on various values, including autonomy, in medical ethics