I think we should keep the increased levels of beta-hCG as this is the biggest association. I agree the evidence for the other risk factors is debatable. Maybe reword to “What is the main key risk factor for HG?” @alexlewis
@Stapedius I too prefer reworking in this format. If you’re happy, I will reject this suggestion and rewrite. Agree with @alexlewis that the current form doesn’t work.