Here is the English translation of the provided text: "Continuously took emergency contraception twice in December, January's menstrual period was delayed."

Patient's question:

No

Doctor's answer:

Hello. As you mentioned, the main component of emergency contraception pills is estrogen, which can interfere with a woman's endocrine system, leading to changes in the menstrual cycle. Mild cases may result in early or delayed menstruation, while severe cases can cause menstrual disorders or irregular periods. It is recommended to pay attention to safety measures in the future and avoid using emergency contraception pills as much as possible. Overuse of birth control pills can affect pregnancy.