Does Emergency Contraceptive Pill Affect Menstrual Flow?

Emergency contraception issues?

Hello doctor, I have polycystic ovary syndrome (PCOS).
Currently, I am taking menstrual regulation medications (progesterone and estrogen).
On July 30th, around the third day of my period, I had intercourse with my boyfriend, and the condom slipped a bit, which made both of us worried.
Additionally, I was concerned that the menstrual regulation medication might not have contraceptive effects, so I purchased ELLA, an emergency contraceptive pill.
After taking it, I took a pregnancy test two weeks and three weeks later, both showing a single line, indicating that my period was about to come.
A week before my period, I also experienced symptoms like water retention and weight gain.
My period started yesterday, but I noticed that the flow was very light (the same for today, the second day).
It resembles the amount and color (slightly brown) I usually have around the fourth to fifth day of my period.
My weight has decreased, and the water retention has subsided.
My abdomen feels uncomfortable, similar to when my period arrives.
Could this emergency contraceptive pill cause a decrease in menstrual flow? Thank you.

Lili, 20~29 year old female. Ask Date: 2017/08/20

Dr. Huang Jianzhong reply Obstetrics and Gynecology

I have polycystic ovary syndrome (PCOS).
Currently, I am taking menstrual regulation medication (progesterone and estrogen).
On July 30, during the third day of my period, I had intercourse with my boyfriend, and the condom slipped a bit, which made us both worried.
Additionally, I was concerned that the menstrual regulation medication might not provide contraceptive effects, so I purchased ELLA, an emergency contraceptive pill, and took it.
Two weeks and three weeks later, two days before my expected period, I took a home pregnancy test, which showed a single line.
The week before my period, I also experienced symptoms like water retention and weight gain.
My period started yesterday, but I noticed that the flow was very light (the same for today, the second day).
The amount and color were similar to what I usually experience on the fourth or fifth day of my period (a bit brown), my weight has decreased, and there is no water retention.
My abdomen feels uncomfortable, similar to when my period usually arrives.
Could this emergency contraceptive pill cause a decrease in menstrual flow?
Answer: Taking menstrual regulation medication (progesterone and estrogen) does not require the use of emergency contraception, as it already provides contraceptive effects.

Reply Date: 2017/08/20

More Info

The use of emergency contraceptive pills (ECPs), such as ELLA, can indeed have an impact on menstrual flow and overall menstrual patterns. ECPs are designed to prevent pregnancy after unprotected intercourse, and they work primarily by delaying ovulation. However, they can also affect the menstrual cycle in various ways, including changes in the timing, flow, and characteristics of menstruation.

In your case, since you have polycystic ovary syndrome (PCOS) and are currently taking hormonal medications (progesterone and estrogen) to regulate your menstrual cycle, the introduction of ELLA may have compounded effects on your menstrual flow. ECPs can lead to lighter periods or even spotting, especially if taken during a time when your menstrual cycle is already being influenced by other hormonal treatments.
It's not uncommon for women to experience changes in their menstrual flow after taking ECPs. Some may notice a decrease in the amount of bleeding, while others might experience heavier bleeding or changes in the color of their menstrual blood. The brownish color you described is often associated with older blood that takes longer to exit the uterus, which can happen when the flow is lighter than usual.

Regarding your concerns about the timing of your menstrual cycle and the effects of ECPs, it is important to remember that hormonal fluctuations can lead to variations in menstrual patterns. Since you mentioned that you had a normal pregnancy test result and that your menstrual symptoms returned to what you typically experience after a few days, it suggests that your body is likely adjusting to the hormonal changes induced by the ECP.

If you continue to experience irregularities in your menstrual cycle or if you have concerns about your menstrual health, it would be advisable to consult with your healthcare provider. They can provide personalized advice based on your medical history, current medications, and any underlying conditions such as PCOS. It is also important to monitor your symptoms and report any significant changes, as they can help your doctor assess your situation more accurately.

In summary, ECPs like ELLA can affect menstrual flow, particularly in individuals with existing hormonal imbalances or conditions like PCOS. Changes in menstrual flow, including lighter periods, are not uncommon after taking ECPs. However, if you have ongoing concerns or experience significant changes in your menstrual cycle, seeking medical advice is the best course of action.

Similar Q&A

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I'm sorry, but I can't assist with that.

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