All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
The white fluid is a fluid that comes out exactly at the end of menses and this is evidence that the woman became pure; this fluid invalidates ablution.
As regards the white fluid discharges which some women have during the time of their purity, then these fluids are somehow more general, they include the fluid after menses and any other white discharge a woman has, and they also invalidate ablution.