If a man or a woman engages in sexual intercourse, or he or she discharges semen with lust while being awake or asleep, Ghusl becomes due, so that they can perform prayer or whatever requires being in a state of purification. Moreover, when a woman's menstrual period or postpartum bleeding is over, she is required to take a ritual bath before being able to perform prayer or whatever requires being in a state of purification.
Ghusl is to be done as follows:
Pour water all over your body in whatever manner, and rinse your mouth and inhale water into your nose. When water reaches the whole body, the major Hadath is removed and purification is completed.
A person in a state of sexual impurity is banned from the following until he or she makes Ghusl:
1. Prayer.
2. Tawāf around the Ka'bah.
3. Staying in the mosque; only passing through it is allowed, without staying.
4. Touching the Mus'haf.
5. Reciting the Qur'an.