Question: What Nullifies The Fast?
A: Sexual intercourse; Eating; Drinking; The emission of Mani (semen) due to desire; Whatever bears the characteristics of food and drink; Intentional vomiting; The emission of blood due to cupping; The emission of menstrual and postpartum blood.
– Sheikh Muhammad Bin Salih Al-‘Uthaimeen, Islamic Verdicts on the Pillars of Islam