Not graded
Sunan ad-Darimi 924
أَخْبَرَنَا مُحَمَّدُ بْنُ يُوسُفَ حَدَّثَنَا سُفْيَانُ عَنْ يُونُسَ عَنْ الْحَسَنِ قَالَ هِيَ بِمَنْزِلَةِ الْمُسْتَحَاضَةِ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 924).