What are the side effects of oral contraceptives on women?

Contraceptive pills contain a large amount of estrogen and progesterone. After taking contraceptive pills, it may cause symptoms such as prolonged menstruation, shortened menstruation, increased menstrual blood, decreased menstrual blood, dysmenorrhea and lower abdominal pain. In severe cases, it may also lead to amenorrhea. Precautions: Emergency contraception should not be taken three times a year.