Timing for Taking Birth Control Pills Before Menstruation - Obstetrics and Gynecology

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Timing for Taking Emergency Contraceptive Pills


Hello, doctor.
I plan to start taking the contraceptive pill, Yejishi, to regulate my menstrual cycle (not for contraception).
I took the first pill on the evening of December 13th and started experiencing brown discharge along with mild abdominal pain, which feels like the onset of my period.
However, as of now, December 14th, I have only noticed a small amount of brown discharge.
Based on my previous experiences, I typically have a small amount of brown discharge for two days before seeing brighter red menstrual blood.
I would like to know if I should consider December 13th as the start of my period.
Will continuing to take the contraceptive pill affect this situation? Is it possible that I am not actually experiencing a true menstrual onset, and starting the medication could harm my body?

Ting Ting, 30~39 year old female. Ask Date: 2015/12/14

Dr. Lin Wenbin reply Obstetrics and Gynecology


A physician's examination is required before deciding whether to continue the medication.

Reply Date: 2015/12/14

More Info


When it comes to starting birth control pills, especially for the purpose of regulating menstrual cycles rather than for contraception, timing and understanding your body's signals are crucial. Based on your description, you began taking the birth control pill (in this case, 悅己) on December 13th, and you experienced some brown discharge along with mild abdominal pain, which can indeed be indicative of an impending menstrual period. However, the brown discharge you are experiencing is often a sign of old blood, which can occur at the beginning or end of a menstrual cycle.

To address your primary concern: yes, you can consider December 13th as the start of your menstrual cycle, especially since you are experiencing symptoms that typically accompany the onset of menstruation. The brown discharge, while not the typical bright red menstrual blood, can still be part of the menstrual process. It is important to note that menstrual cycles can vary significantly from month to month, and the presence of brown discharge does not necessarily mean that you should stop taking your birth control pills.

Continuing to take the birth control pills as prescribed is generally safe and should not harm your body. Birth control pills work by regulating hormones, and starting them during your menstrual cycle can help stabilize your cycle over time. If you are concerned about the brown discharge and whether it indicates a problem, it may be beneficial to consult with your healthcare provider for personalized advice.

In terms of the potential effects on your body, starting birth control pills during a time when you are experiencing unusual menstrual symptoms is not uncommon. Many women start taking birth control pills while experiencing irregularities in their cycles, and the pills can help to regulate these patterns. It is also worth noting that some women may experience spotting or brown discharge when they first start taking birth control pills, as their bodies adjust to the hormonal changes.

If you continue to experience only brown discharge without the onset of regular menstrual flow, it might be a good idea to monitor your symptoms over the next few days. If the discharge persists or if you have any concerns about your health, reaching out to your healthcare provider is advisable. They can provide you with further insights and determine if any additional evaluation is necessary.

In summary, you can proceed with taking your birth control pills as planned. The brown discharge you are experiencing can be a normal part of your menstrual cycle, and starting the pills should not negatively impact your health. If you have any lingering concerns or if your symptoms change, do not hesitate to seek medical advice. Regular communication with your healthcare provider is key to managing your reproductive health effectively.

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