What is the reason for vaginal bleeding while taking desogestrel and ethinyl estradiol tablets?

Patient's question:

I have been taking desogestrel and ethinyl estradiol tablets for five months. Before starting the medication, I experienced irregular menstruation and spotting again. After taking desogestrel and ethinyl estradiol tablets, there was no bleeding during the medication period, and bleeding during the off-medication period was very regular. However, this time, on the seventh day of taking the medication, I felt some breast tenderness and on the tenth day, there was a very small amount of vaginal bleeding. There was no abdominal pain or other physical discomfort. It has been two days since the bleeding started. What could be the reason for this? Do I need to stop taking desogestrel and ethinyl estradiol tablets? Thank you.

Doctor's answer:

Hello, if it occurs in the middle of your menstrual period, it may be ovulation bleeding. During the mid-cycle, which is the ovulation period, the estrogen level temporarily rises, causing the endometrium to lose hormonal support and partially shed again, leading to regular vaginal bleeding, known as ovulation bleeding. In traditional Chinese medicine, it is referred to as "intermenstrual bleeding." Generally, the bleeding amount is small and does not exceed seven days, and treatment is not necessary. Pay attention to a light diet and appropriately adjust your mindset. Prevention and regulation involve paying attention to menstrual and postpartum care, maintaining external genital cleanliness, and preventing pelvic infection.

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