Translation: Some scholars hold the view that this command is before the Holy Prophet (Sallallahu alaihi wa sallam) permitted visiting graves. When He (Sallallahu alaihi wa sallam) gave the permission, both men and women are included in it.
The leader of the women in Jannah, Hadhrat Fatima Zahra (May Allah be well pleased with her) would visit the blessed grave of Hadhrat Ameer Hamza, offer Salaat and make moving supplications. (Mustadrak ‘Alas Saihain, Vol. 1, Pg. No. 533, Kitab Ul Janaaiz)
Hadhrat Imam Ahmed Bin Ismail Tahtahawi (Dec. 1231) says:
Translation: To summarize, the permission for women is when the visitation is performed in such a way that there is no fear of moral corruption and most authoritative opinion is that the permission of visiting is established for both men and women, as Hadhrat Fatima (May Allah be well pleased with her) would visit the grave of Hadhrat Ameer Hamza (May Allah be well pleased with him) every Friday and Hadhrat Aisha Siddiqua (May Allah be well pleased with her) would visit the grave of her brother Hadhrat Abdur Rahman Bin Abu Bakr (May Allah be well pleased with him) in Makkah. (Haashiya Tahtahawi ‘Ala Miraqil Falah, Pg. No. 620)