It is narrated from Hazrat Khawlah bint Hakim (may Allah be pleased with her) that she asked the Prophet (peace and blessings be upon him) about this issue: If a woman experiences in a dream the same condition that a man experiences, what is the ruling? The Prophet (peace and blessings be upon him) said: "She should perform ghusl (ritual bath)."
Hadith Referenceمسند احمد / من مسند القبائل / 27313
Hadith Gradingحکم دارالسلام:حديث حسن، عطاء الخراساني صاحب أوهام، وقد توبع