Ibrahim bin Sa'd (may Allah have mercy on him) narrated it from al-Zuhri, from Amrah, from Aishah (may Allah be pleased with her).
The hadith is sahih (authentic) from both of them (Urwah and Amrah).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحيض / 1638