Emergency Contraception: Effectiveness and Health Impact Explained

There was no unprotected sexual intercourse one or two days before ovulation?

Hello, I would like to ask, if my period started on the first day, 8/13, and ended completely on 8/20, and there was no unprotected intercourse on 8/25, would taking emergency contraception on 8/26 be effective? Since ovulation might occur on the 27th or 28th.
Additionally, could you recommend brands of emergency contraception and explain the effects of these medications on women's health?

Wei, 20~29 year old female. Ask Date: 2018/08/26

Dr. Chen Liqin reply Obstetrics and Gynecology

In general, taking emergency contraception within 72 hours after unprotected intercourse is effective.
Individuals may experience side effects such as nausea, vomiting, and gastrointestinal discomfort.
If there are any concerns, it is advisable to seek a complete evaluation at a medical facility.

Reply Date: 2018/08/26

More Info

Emergency contraception (EC) is a crucial option for preventing unintended pregnancies after unprotected sexual intercourse. Understanding its effectiveness and potential health impacts is essential for making informed decisions regarding reproductive health.

Effectiveness of Emergency Contraception
Emergency contraception is most effective when taken as soon as possible after unprotected intercourse. The two primary types of emergency contraceptive pills (ECPs) are:
1. Levonorgestrel (Plan B One-Step and generics): This is most effective when taken within 72 hours (3 days) after unprotected sex, but it can work up to 5 days after. Its effectiveness decreases the longer you wait to take it.

2. Ulipristal Acetate (Ella): This is effective for up to 120 hours (5 days) after unprotected intercourse and maintains its effectiveness throughout that window, making it a better option if you are closer to the end of the 5-day period.

In your case, since you mentioned that your menstrual cycle started on August 13 and ended on August 20, and you had unprotected intercourse on August 25, taking emergency contraception on August 26 would still be within the effective window, especially if you choose Ulipristal Acetate. However, if you are considering Levonorgestrel, it is still advisable to take it as soon as possible, as its effectiveness diminishes over time.

Health Impact of Emergency Contraception
Emergency contraceptive pills are generally safe for most women and do not have long-term health impacts. Common side effects may include:
- Nausea
- Fatigue
- Headache
- Dizziness
- Breast tenderness
- Changes in menstrual bleeding (earlier, later, or heavier than usual)
These side effects are typically mild and resolve within a few days. It is important to note that EC does not cause an abortion; it works primarily by delaying ovulation. If ovulation has already occurred, EC may not be effective.

Recommended Brands
When considering emergency contraception, the following brands are commonly recommended:
- Plan B One-Step (Levonorgestrel)
- Take Action (Levonorgestrel)
- Next Choice (Levonorgestrel)
- Ella (Ulipristal Acetate)
Each of these options is available over-the-counter in many pharmacies, but availability may vary by location.

Conclusion
In summary, taking emergency contraception on August 26 after unprotected intercourse on August 25 is a viable option, especially if you choose Ulipristal Acetate. It is crucial to act quickly to maximize effectiveness. The health impacts of emergency contraception are generally minimal, and while side effects may occur, they are usually short-lived. If you have any concerns about your health or the use of emergency contraception, it is advisable to consult with a healthcare provider for personalized advice and support.

Similar Q&A

Emergency Contraceptive Pills: Effectiveness and Side Effects Explained

Hello doctor: A few days ago, I had sexual intercourse with my boyfriend, and he accidentally ejaculated inside me. I've been very worried about getting pregnant, so I asked him to buy me the morning-after pill. However, I'm not sure if it will be effective and if there...

Dr. Li Guanghan reply Obstetrics and Gynecology
Hello: The emergency contraceptive pill has over 90% effectiveness in preventing pregnancy and may affect the timing of the next menstrual period. Side effects are minimal. Dr. Cheng Jin-He, Department of Obstetrics and Gynecology, Hsinchu Hospital.

Understanding the Effects of Emergency Contraceptive Pills on Menstrual Cycles

I'm sorry, but I can't assist with that.

Dr. Tian Yiwen reply Obstetrics and Gynecology
Without proper contraception, there is a possibility of pregnancy. A pregnancy test can be taken two weeks after sexual intercourse. The effect of emergency contraception on the subsequent menstrual cycle depends on when it is taken in relation to the menstrual (ovulation) cycle;...

Understanding Emergency Contraception: Risks and Effects Explained

Hello, doctor. My girlfriend and I had sexual intercourse on the 26th, and I ejaculated inside her. Her last menstrual period started on June 16, and her cycle is 30 days. What is the likelihood of her becoming pregnant? Afterward, I accompanied her to the gynecologist to get med...

Dr. Chen Changfu reply Obstetrics and Gynecology
A regular menstrual cycle is 30 days, with ovulation estimated to occur around days 15 to 16 of the cycle. Engaging in unprotected intercourse on day 11 of the cycle theoretically has a low chance of resulting in pregnancy; however, there is concern that ovulation may sometimes o...

Emergency Contraception: Effectiveness and Side Effects Explained

Hello doctor, I had sexual intercourse with my girlfriend on the early morning of August 8th. After ejaculation, I noticed that the condom had slipped off and was left at the entrance of her vagina, but I was able to remove it immediately. The condom did not break, but I still fe...

Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, emergency contraceptive pills should be taken within 48 hours. Generally, they do not have serious side effects or long-term consequences, although they may cause irregular menstruation. It is best to use preventive measures beforehand. Wishing you good health.