Only emergency contraceptives are clinically separated from time to time. Short-acting contraceptives have to be taken every day in a row, so if you take the pill twice a week, you are considered to be taking the emergency contraceptive pill. Emergency contraceptives often cause the following consequences: i. The vast majority of drugs are detoxified by the liver and excreted by the kidneys, and the progestin contained in the emergency contraceptive pill is more than five times the progestin contained in other short-acting contraceptives, which may increase the burden on the liver and kidneys and cause damage to liver and kidney function in clinical practice. Second, because the emergency contraceptive pill inhibits ovulation of the ovaries and breaks the original natural ovulation pattern of the ovaries, it is likely to cause endocrine disorders and irregular vaginal bleeding.