These factors were most frequently associated with the diagnosis and/or the recognition of the high risk status of the woman, the treatment provided and clinical leadership.
Roedd y ffactorau hyn yn gysylltiedig â diagnosis a/neu adnabod statws risg uchel y fenyw, y driniaeth a roddwyd ac arweinyddiaeth glinigol yn y rhan fwyaf o achosion.