بسم الله الرحمن الرحيم
Three things make ghusl wajib on a woman: (1) Janabah i.e. major impurity caused by intercourse or ejaculation (2) Haiz i.e. menstruation (3) Nifas i.e. postpartum period.
The fluid that the private part of a woman discharges whole month it does not make ghusl wajib, but it breaks wudhu. If the fluid discharges in the form of mani (semen) with force due to sexual thought or by touching husband with lust then ghusl shall be wajib.
Allah knows Best!
Darul Uloom Deoband