First Time Taking Birth Control: Missed Period Concerns Explained - Obstetrics and Gynecology

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I took birth control pills for the first time, and my period didn't come the next day?


Hello: On August 27, I experienced slight bleeding and thought it was my menstrual period, so I started taking birth control pills on August 28.
However, I found that my period did not come, but I continued taking the pills.
On August 29, I started having bleeding, which I believe is my period, and I still continued taking the birth control pills.
I am using a 21-pill pack, and the instructions state to start taking them on the first day of my period.
I have two questions: 1.
Does this mean I started taking the pills before my actual menstrual period? 2.
If I started early, should I continue taking the pills or stop and wait for the next period to restart? Thank you.

J, 20~29 year old female. Ask Date: 2016/08/29

Dr. Huang Yiwen reply Obstetrics and Gynecology


Hello Ms.
J: Your method of taking the medication is correct (if your last menstrual period was around July 27), you should continue taking the contraceptive pills.

Reply Date: 2016/08/29

More Info


When it comes to starting birth control pills, especially for the first time, it's important to understand how they work and what to expect regarding your menstrual cycle. Based on your situation, let’s address your concerns step by step.

1. Understanding Your Initial Bleeding: You mentioned experiencing light bleeding on August 27, which you thought was your period, and then you started taking the birth control pills on August 28. However, you later realized that your actual period did not arrive until August 29. This situation can be a bit confusing, but it’s essential to note that the bleeding you experienced on August 27 could have been spotting rather than a full menstrual period. Birth control pills are typically recommended to be started on the first day of your actual menstrual period for maximum effectiveness, but starting them during spotting is not uncommon.

2. Continuing or Stopping the Pills: Since you began taking the pills on August 28 and continued through the spotting on August 29, you should continue taking the pills as prescribed. The general recommendation is to take the pills consistently every day, regardless of whether you are experiencing bleeding or not. Stopping the pills after starting them can disrupt your cycle and may lead to unintended pregnancy if you are not using another form of contraception.

3. What to Expect: It’s common for your body to take some time to adjust to hormonal birth control. You might experience irregular bleeding or spotting during the first few months of use. This is often referred to as "breakthrough bleeding" and is usually not a cause for concern. Your body is adjusting to the hormones in the pills, and this can take a few cycles.

4. Next Steps: If you continue to have concerns about your menstrual cycle or the effectiveness of the birth control pills, it’s advisable to consult with your healthcare provider. They can provide personalized advice based on your health history and any specific concerns you may have. Additionally, if you experience heavy bleeding, severe pain, or any other unusual symptoms, you should seek medical attention promptly.

5. Importance of Consistency: Remember that consistency is key when taking birth control pills. Taking them at the same time every day helps maintain stable hormone levels in your body, which is crucial for preventing ovulation and ensuring the effectiveness of the contraceptive method.

6. Future Considerations: If you find that the birth control pills do not suit you after a few months, or if you experience side effects that are bothersome, there are many other contraceptive options available, including IUDs, implants, patches, and injections. Discussing these options with your healthcare provider can help you find the method that best fits your lifestyle and health needs.

In summary, it seems you have started your birth control pills correctly, and you should continue taking them as prescribed. Monitor your body’s response over the next few months, and don’t hesitate to reach out to your healthcare provider with any questions or concerns. They are there to help you navigate this new phase of your reproductive health.

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