Purity: Doubt About Miscarriage and Nifas

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 501:

Whenever a person doubts whether something is miscarried, or whether the thing that is miscarried is a child, it is not necessary to investigate; and the blood that comes out is not legally ruled to be nifās.

-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)