Emergency Contraception: Risks and Guidelines for Unsafe Periods - Obstetrics and Gynecology

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There were no issues before engaging in sexual intercourse during the fertile period, but I still feel anxious.
I took emergency contraception on April 17, and then had sexual intercourse during the fertile period on April 23.
Can I take the emergency contraception again on April 24? Will it have any effects on my body?

123, 10~19 year old female. Ask Date: 2016/04/24

Dr. Lin Manying reply Obstetrics and Gynecology


For such issues, it is recommended to refer to the National Health Service's "Sexual Wellness e-Learning" or the Obstetrics and Gynecology Society's "Consultation Guide for Adolescent Contraception" at http://goo.gl/dc6PfW.
If you are concerned, you may need to take it again, but this is considered an inappropriate practice that can affect your health.
It is advised to use regular contraceptive pills or condoms for contraception.

Reply Date: 2016/04/24

More Info


Emergency contraception (EC) is a crucial option for individuals who have had unprotected intercourse during their fertile window, often referred to as the "unsafe period." This period typically encompasses the days leading up to and including ovulation, when the chances of conception are highest. Understanding the risks and guidelines surrounding the use of emergency contraception is essential for making informed decisions about reproductive health.

In your case, you mentioned taking emergency contraception on April 17 and then having unprotected intercourse again on April 23, during your unsafe period. You are considering taking another dose of emergency contraception on April 24. It is important to note that emergency contraceptive pills (ECPs) are designed to be taken as soon as possible after unprotected intercourse, ideally within 72 hours, but some types can be effective up to 120 hours after intercourse.

There are two main types of emergency contraceptive pills:
1. Levonorgestrel (Plan B One-Step and generics): This is most effective when taken within 72 hours of unprotected intercourse. It is less effective as time passes and is not recommended for use more than 72 hours after the event.

2. Ulipristal Acetate (Ella): This can be taken up to 120 hours (5 days) after unprotected intercourse and is generally more effective than levonorgestrel, especially closer to the time of ovulation.

If you are considering taking another dose of emergency contraception on April 24, it is essential to know that while taking multiple doses of levonorgestrel is not recommended, ulipristal acetate can be taken again if it is within the 120-hour window. However, taking multiple doses of emergency contraception in a short period can lead to side effects such as nausea, fatigue, and changes in your menstrual cycle.
Regarding the impact on your body, emergency contraception is generally safe for most individuals. However, frequent use is not advised as a regular contraceptive method. It is intended for occasional use and should not replace regular contraceptive methods, such as birth control pills, IUDs, or condoms.

If you find yourself needing emergency contraception frequently, it may be beneficial to consult with a healthcare provider about more reliable long-term contraceptive options. They can help you find a method that suits your lifestyle and health needs, reducing the anxiety associated with unprotected intercourse.

In summary, if you are considering taking emergency contraception again, ensure you are aware of the type you are using and the time frame for its effectiveness. If you are using ulipristal acetate and it is within the 120-hour window, it is appropriate to take it again. However, if you are using levonorgestrel, it is not recommended to take it again so soon. Always consult with a healthcare professional for personalized advice and to discuss any concerns regarding your reproductive health.

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