[Machine] Regarding prayer, one's menstruation period is counted as either one day or two days, and after that, she is considered to be in a state of istihaadah (bleeding outside the menstrual period).
عَنِ الصَّلَاةِ تَعُدُّ أَيَّامَ حَيْضِهَا يَوْمًا أَوْ يَوْمَيْنِ ثُمَّ هِيَ بَعْدَ ذَلِكَ مُسْتَحَاضَةٌ»