The ruling on the small amount of blood resulting from an "IUD" for women

Question:
If a woman inserts an "IUD" and then a small amount of blood comes out, is it irregular non-menstrual bleeding or menstruation?

Answer:
She should refer to her usual cycle. Whatever comes during the time of her usual cycle, she leaves off the prayer. Whatever comes outside of her usual cycle is irregular non-menstrual bleeding, which is corrupt blood.
Q: Does her cycle become irregular because of this?
The Shaykh: Yes, she should take her usual cycle into account.