The most direct way to determine if a contraceptive pill has taken effect is whether the woman is pregnant or not. Common contraceptive pills are mainly divided into three categories: short-acting contraceptive pills, emergency contraceptive pills and long-acting contraceptive pills. 2, emergency contraceptive pills: for patients using emergency contraceptive pills, usually there is no obvious contraceptive success performance, and some patients may have some withdrawal bleeding in the endometrium after taking the pills due to the influence of hormonal regulation. If there is no bleeding phenomenon, but the monthly menstruation is normal or HCG test shows negative, generally also indicates the success of contraception; 3, long-acting contraceptive pills: long-acting contraceptive pills after taking, if the patient after 9-11 days of intercourse for HCG determination is negative, and normal menstruation generally represents the contraceptive pill effective, some female patients may also appear the phenomenon of increased menstruation, prolonged periods. Some women may experience increased menstrual flow and prolonged periods. The pill has some side effects, and patients who need contraception are advised to use other forms of contraception that are less harmful to their health, such as penile or vaginal condoms.