Women must also perform ghusl for a wet dream

that Umm Sulaym asked the Messenger of Allah ﷺ about a woman if she had a wet dream like that of a man. He said, "If water is released then let her perform Ghusl."  

أَنَّ أُمَّ سُلَيْمٍ سَأَلَتْ رَسُولَ اللَّهِ ﷺ عَنِ الْمَرْأَةِ تَرَى فِي مَنَامِهَا مَا يَرَى الرَّجُلُ قَالَ: «إِذَا أَنْزَلَتِ الْمَاءَ فَلْتَغْتَسِلْ۔»  

"O Messenger of Allah! Allah is not shy to tell the truth. Inform me: if a women sees in a dream what men see should she perform Ghusl from that?" The Messenger of Allah ﷺ said to her: "Yes." 'Aishah said: "I expressed my displeasure and said: 'Does a woman see that?' The Messenger of Allah ﷺ turned to me and said: 'May your right hand be covered with dust! How else would (her child) resemble her?'"  

أَنَّ أُمَّ سُلَيْمٍ كَلَّمَتْ رَسُولَ اللَّهِ ﷺ وَعَائِشَةُ جَالِسَةٌ فَقَالَتْ لَهُ يَا رَسُولَ اللَّهِ إِنَّ اللَّهَ لاَ يَسْتَحْيِي مِنَ الْحَقِّ أَرَأَيْتَ الْمَرْأَةَ تَرَى فِي النَّوْمِ مَا يَرَى الرَّجُلُ أَفَتَغْتَسِلُ مِنْ ذَلِكَ فَقَالَ لَهَا رَسُولُ اللَّهِ ﷺ نَعَمْ قَالَتْ عَائِشَةُ فَقُلْتُ لَهَا أُفٍّ لَكِ أَوَتَرَى الْمَرْأَةُ ذَلِكِ فَالْتَفَتَ إِلَىَّ رَسُولُ اللَّهِ ﷺ فَقَالَ تَرِبَتْ يَمِينُكِ فَمِنْ أَيْنَ يَكُونُ الشَّبَهُ  

"O Messenger of Allah, Allah is not shy to tell the truth. Does a women have to perform Ghusl if she has a wet dream?" He said: "Yes, if she sees water."[1] Umm Salamah laughed and said: "Do women really have wet dreams?" The Messenger of Allah ﷺ said: "How else would her child resemble her?" [1] That is, if she has an emission of the fluid of an orgasm.  

يَا رَسُولَ اللَّهِ إِنَّ اللَّهَ لاَ يَسْتَحْيِي مِنَ الْحَقِّ هَلْ عَلَى الْمَرْأَةِ غُسْلٌ إِذَا هِيَ احْتَلَمَتْ قَالَ نَعَمْ إِذَا رَأَتِ الْمَاءَ فَضَحِكَتْ أُمُّ سَلَمَةَ فَقَالَتْ أَتَحْتَلِمُ الْمَرْأَةُ فَقَالَ رَسُولُ اللَّهِ ﷺ فَفِيمَ يُشْبِهُهَا الْوَلَدُ  

"I asked the Messenger of Allah ﷺ about a woman who has a wet dream and he said: 'If she sees water, let her perform Ghusl.'"  

سَأَلْتُ رَسُولَ اللَّهِ ﷺ عَنِ الْمَرْأَةِ تَحْتَلِمُ فِي مَنَامِهَا فَقَالَ إِذَا رَأَتِ الْمَاءَ فَلْتَغْتَسِلْ