How Long to Take Birth Control Pills for Effective Protection?

First time taking oral contraceptives?

Hello, doctor.
This is my first time taking the oral contraceptive pill (Kiryuan).
I started taking it on the third day of my menstrual period.
I would like to ask how many days I need to take it before it becomes effective for contraception?

Niming, 10~19 year old female. Ask Date: 2018/05/05

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, if you start taking birth control pills on the fifth day of your menstrual period and take them consistently, they will be effective for contraception.
They are still effective if taken on the third day.
Wishing you good health!

Reply Date: 2018/05/05

More Info

When it comes to taking birth control pills, particularly combined oral contraceptives like "祈麗安" (which is likely a brand name for a combination pill), the timing of when you start taking them in relation to your menstrual cycle is crucial for their effectiveness in preventing pregnancy.

If you start taking the pill during the first five days of your menstrual cycle (the first day of your period is considered Day 1), you are protected from pregnancy immediately. However, since you mentioned that you started taking the pill on the third day of your period, you are within that window, and you should be protected right away.

If you start taking the pill at any other time in your cycle (after the first five days), it is generally recommended to use an additional form of contraception, such as condoms, for the first seven days of taking the pill. This is to ensure that the hormones in the pill have had enough time to build up in your system and effectively prevent ovulation.

It's also important to take the pill consistently at the same time every day to maintain its effectiveness. Missing doses or taking them at irregular times can decrease the pill's efficacy and increase the risk of unintended pregnancy.

In summary, since you started taking the pill on the third day of your period, you should be protected from pregnancy immediately. However, if you had started it later in your cycle, you would need to wait seven days for full protection. Always consult with your healthcare provider for personalized advice and to address any specific concerns you may have regarding your birth control method.

Additionally, it's worth noting that while birth control pills are highly effective when taken correctly, they do not protect against sexually transmitted infections (STIs). Therefore, if you are at risk for STIs, consider using condoms in conjunction with your birth control pills for comprehensive protection.

Lastly, if you have any further questions about your birth control method or if you experience any side effects, don't hesitate to reach out to your healthcare provider. They can provide you with the most accurate and personalized information based on your health history and needs.

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