Does emergency contraception delay menstruation?

Patient's question:

Doctor, I would like to consult with you. After having sex with my partner, we both use emergency contraception. However, recently, for the past year, I have basically had to take emergency contraceptive pills almost every month. I feel like my menstrual cycle has become very irregular. Since it's been delayed by a few days almost every month, I would like to consult about whether emergency contraception pills can cause menstrual delay?

Doctor's answer:

For emergency contraception medication, the breastfeeding dosage is relatively high, and it is generally not recommended for frequent oral administration. Since you take some forms of contraception monthly, this situation can easily affect your menstrual cycle, causing it to be delayed or potentially leading to menstrual disorders. Under normal circumstances, emergency contraception medication is advised to be taken no more than twice per month, and no more than three times within a year. You need to adopt a regulation treatment under the guidance of a doctor to restore normal menstruation, while also paying attention to using proper contraceptive measures.

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