Victims of rape or sexual assault may be reluctant to report the crime for fear of being judged as responsible for what has happened to them.
Gallai dioddefwyr trais neu ymosodiad rhywiol fod yn anfodlon cofnodi'r drosedd rhag ofn i bobl feddwl mai nhw sy'n gyfrifol am yr hyn sydd wedi digwydd iddyn nhw.