Source : Duas.org / 13 May 2013

When his eyes fall on water:

I begin my ablution in the Name of Allah. All praise is due to Allah, Who made water purifying, and not najis.               

Bismillahi wa billahi wal hamdu lil lahil lazi ja'alal ma'a tahura wa lam yaj alhu najisa.

By Mufti Muhammad ibn Adam al-Kawthari / 6 May 2013

In the name of Allah, Most Compassionate, Most Merciful.

There are two aspects to your question:

1) When and how is an individual classified as excused (ma’dhur)?

2) What are the rulings concerning a Ma’dhur ?

By NewMuslims.com / 30 Apr 2013

There are special regulations in Islam legislated for women regarding the three types of bleeding they experience, that are menses, post-partum bleeding, and abnormal bleeding. Women must understand the rulings pertinent to each type, as they deal with important aspects of worship, such as purification, prayer and fasting. This lesson will try to explain the most important rulings relevant to each type of bleeding.