Can emergency contraception pills cause menstrual disorders and lead to infertility?

Patient's question:

Before taking medication, my menstrual cycle used to come around the 18th of each month. Now it's been delayed by about ten days, and it always comes around the 30th of each month. I don't know if it will cause infertility? I've taken emergency contraception four times in the past seven and a half months, and I'll never do it again. Can I still avoid getting pregnant? I hope the kind-hearted doctor can help me!!!!

Doctor's answer:

Guidance:
Hello!
The main components of emergency contraception pills are estrogen and progesterone. Excessive intake of estrogen can lead to endocrine disorders in women, causing side effects such as irregular menstruation. However, it does not affect normal ovulation or normal pregnancy afterward. You don't need to worry too much, as your menstrual cycle will return to normal after some time. Hope this helps.

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