When to Start Your Birth Control Pills: A Guide - Obstetrics and Gynecology

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First medication administration?


Hello, I recently purchased the Family Planning No.
1 oral contraceptive from the Women's and Children's Association.
The nurse told me to start taking it on the fifth day of my menstrual period.
However, this morning I noticed some light spotting on my panty liner, but later I used a tampon and did not see any further bleeding.
I'm not sure if I should consider today as the first day of my period.
Should I wait for a normal flow before I start counting, or does this spotting count as the first day of my menstrual cycle? Thank you.

Valerie, 20~29 year old female. Ask Date: 2016/07/07

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, if the timing is similar to the last time, consider it as the first day; otherwise, observe for a few more days.
Wishing you good health.

Reply Date: 2016/07/07

More Info


When it comes to starting birth control pills, understanding when to begin is crucial for their effectiveness. The general guideline is to start taking the pills on the first day of your menstrual period or, as some healthcare providers suggest, on the fifth day of your cycle. However, determining the first day of your period can sometimes be confusing, especially when dealing with light spotting or unusual discharge.

In your case, you mentioned noticing a small amount of blood mixed with discharge, but it was not enough to be considered a full menstrual flow. Typically, the first day of your period is defined as the first day of noticeable bleeding that requires a pad or tampon. If the bleeding you observed was very light and did not progress, it may not qualify as the start of your menstrual cycle.

Given that you experienced only a small amount of spotting, it would be advisable to wait until you have a more substantial flow before starting your birth control pills. This is to ensure that you are accurately tracking your cycle and starting the pills at the correct time. If you do not have a clear menstrual flow within a few days, you might consider starting the pills anyway, but it would be best to consult with your healthcare provider for personalized advice.

It's also important to note that if you start taking the pills after your period has begun, you should continue taking them as directed, even if your period ends. Birth control pills typically take about seven days to become effective if you start them after your period. Therefore, if you begin taking them on the fifth day of your cycle, you may need to use an additional form of contraception, such as condoms, for the first week to ensure you are fully protected against pregnancy.

Additionally, if you have recently moved to a new location, such as Europe, changes in your environment, diet, or stress levels can affect your menstrual cycle. It's not uncommon for women to experience irregularities in their periods due to such changes. If you notice significant changes in your cycle or have concerns about your menstrual health, it would be wise to consult with a healthcare professional.

In summary, the best approach for you would be to monitor your bleeding closely. If you experience a more significant flow, you can start your birth control pills as advised. If the light spotting continues without developing into a full period, it may be best to wait and consult with a healthcare provider for further guidance. Remember, accurate tracking of your menstrual cycle is essential for effective birth control use, and when in doubt, seeking professional advice is always a good practice.

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