Penderfynodd y panel hefyd y gallai camau mwy effeithiol i leihau effeithiau niweidiol smygu a phwysau gwaed uchel yn ystod beichiogrwydd fod wedi lleihau’r risg o farw-enedigaeth.
The panel also determined that more effective action to reduce the adverse impact of smoking and raised blood pressure during pregnancy could have reduced the risk of stillbirth.