Menstrual Irregularities and Birth Control: Your Questions Answered - Obstetrics and Gynecology

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Taking menstrual induction medication?


I have a problem with irregular menstruation.
Last month, my period did not come, so I went to a gynecologist for a check-up and was confirmed not to be pregnant.
The doctor prescribed me medication to induce menstruation, which I started taking on September 12.
The next day, my period began, but since I thought it had started, I stopped taking the medication.
However, this time the menstrual flow was very light and dark red in color, lasting only two days before stopping.
I then resumed taking the medication to induce menstruation, and my period came again, but the flow and color were still unusual.
Overall, it lasted for seven days, and on the eighth day, the color of the menstrual blood began to turn bright red, and the flow increased, making me feel like this was the actual first day of my period.
Recently, I have been considering using birth control pills for contraception (but I have no prior experience with them).
I counted the eighth day of my period as the first day and started taking the birth control pills on the fifth day.
Will I have contraceptive protection after taking them continuously for seven days?

Zhen, 20~29 year old female. Ask Date: 2015/09/29

Dr. Lü Lizheng reply Obstetrics and Gynecology


After taking menstrual induction medication, taking contraceptive pills still provides contraceptive effects.
Sincerely, Dr.
Li-Cheng Lu, Taoyuan Hospital.

Reply Date: 2015/09/29

More Info


Menstrual irregularities can be a common concern for many women, and understanding the underlying causes and treatment options is essential for managing these issues effectively. In your case, it seems that you have experienced a delayed menstrual cycle, followed by a very light period with unusual color changes. This can be concerning, but it is important to remember that various factors can influence menstrual cycles, including hormonal imbalances, stress, changes in weight, and underlying medical conditions.

When you took the medication prescribed by your doctor, it appears to have triggered your menstrual cycle, which is a common response to such medications. However, the subsequent changes in your menstrual flow and color could indicate that your body is still adjusting to the hormonal changes. The fact that your menstrual flow was initially light and dark red, and then became brighter and heavier, suggests that your body may be experiencing fluctuations in hormone levels, which can affect the characteristics of your menstrual blood.

Regarding your question about starting birth control pills, it is important to understand how they work. Birth control pills contain hormones that help regulate your menstrual cycle and prevent ovulation. When starting the pill, it is generally recommended to begin taking it at the start of your menstrual cycle, which is typically considered the first day of your period. However, since you started taking the pill on what you identified as the eighth day of your cycle, it is crucial to consider a few factors.

1. Timing of Effectiveness: Most birth control pills take about seven days to become effective if you start taking them after the first day of your period. Since you began taking the pill on the eighth day, you may not have immediate contraceptive protection. It is advisable to use a backup method of contraception, such as condoms, for at least the first seven days of taking the pill.

2. Continuing the Pill: If you continue to take the birth control pills as prescribed, you should expect your menstrual cycle to stabilize over the next few months. It may take some time for your body to adjust to the hormones in the pill, and you might experience changes in your menstrual flow and cycle regularity during this adjustment period.

3. Consulting Your Doctor: Given your history of irregular periods and the recent changes you've experienced, it is essential to maintain open communication with your healthcare provider. They can provide personalized advice based on your medical history and help monitor your response to the birth control pills. If you continue to experience irregularities or have concerns about your menstrual cycle, your doctor may recommend further evaluation or alternative contraceptive methods.

4. Understanding Your Body: It is also important to pay attention to your body and any symptoms you may experience while on birth control pills. Some women may experience side effects such as nausea, mood changes, or changes in menstrual flow. If you notice any concerning symptoms, do not hesitate to reach out to your healthcare provider.

In summary, while you have taken the first step towards managing your menstrual irregularities and preventing pregnancy with birth control pills, it is crucial to understand the timing of their effectiveness and to communicate with your healthcare provider about any ongoing concerns. With proper guidance and monitoring, you can find a suitable approach to managing your menstrual health and contraceptive needs.

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