Pregnancy Risks and Emergency Contraception: Your Questions Answered - Obstetrics and Gynecology

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Probability of Pregnancy


I am the person who asked question #150997.
I would like to add some information.
I am unable to make changes...
I took emergency contraceptive pills for the first time and stopped taking them around the 13th to 15th day (the pills were accidentally thrown away by a family member).
Four days later, my period started (I took the second pack on the second day of my period).
I have now been taking the second pack for ten days and have had unprotected intercourse with my boyfriend, during which he ejaculated inside me (I have been consistent with the timing of my medication during the first pack and am also taking the current pack at a fixed time).

1.
Is there a possibility of pregnancy?
2.
If I want to take a pregnancy test, how many days should I wait for a more accurate result?
3.
Do I need to take emergency contraception?
4.
If I take emergency contraception, can I continue taking my regular contraceptive pills as usual?
5.
After taking the first pack of emergency contraception, how many pills do I need to take in the second and third packs to achieve stable contraceptive effectiveness?

Niming, 10~19 year old female. Ask Date: 2019/10/30

Dr. Huang Yiwen reply Obstetrics and Gynecology


Hello Miss Anonymous: 1.
Since you are taking birth control pills, you do not need to worry about pregnancy.
2.
If you want to take a pregnancy test, you must wait until at least a week after finishing the birth control pills and if your period has not arrived yet, then the test will be useful.
3.
There is no need to take emergency contraception.
4.
If you are concerned about your period arriving early, then you should continue taking the birth control pills as prescribed.
5.
As long as you have not missed any doses of the birth control pills, you should have a stable contraceptive effect.

Reply Date: 2019/10/30

More Info


Understanding pregnancy risks and emergency contraception is crucial for anyone who is sexually active, especially for those using hormonal contraceptives. Based on your situation, let’s address your questions one by one.

1. Is there a possibility of pregnancy?
Given that you were taking the birth control pill consistently for the first 13 to 15 days before stopping, and then resumed taking it the day after your period started, your risk of pregnancy is relatively low, especially since you have been taking the second pack consistently. However, since you had unprotected intercourse with ejaculation during this time, there is still a small risk of pregnancy. Birth control pills are most effective when taken consistently and correctly, but missing doses can increase the risk of ovulation.

2. When is the best time to take a pregnancy test?
The best time to take a pregnancy test is typically about one week after a missed period. Since you mentioned that your period arrived four days after stopping the first pack, you should wait until at least a week after your next expected period to take a test for the most accurate result. Some sensitive tests can detect pregnancy a few days before a missed period, but for the most reliable results, waiting until after the missed period is recommended.

3. Should you take emergency contraception?
If you are concerned about the possibility of pregnancy due to unprotected intercourse, taking emergency contraception (EC) can be an option. EC is most effective when taken as soon as possible after unprotected sex, ideally within 72 hours, but some forms can be effective up to 5 days after. However, since you are already on birth control, it may not be necessary unless you are worried about the effectiveness of your current contraceptive method due to missed pills.

4. Can you continue taking your regular birth control after taking emergency contraception?
Yes, you can continue taking your regular birth control pills after taking emergency contraception. It is advisable to resume your regular schedule as soon as you take the emergency contraceptive. However, you should also consider using a backup method (like condoms) for at least the next seven days to ensure maximum protection while your body adjusts.

5. How many pills do you need to take for stable contraceptive effectiveness?
Generally, it takes about 7 days of consistent use of the birth control pill for it to reach its full effectiveness if you are starting a new pack. Since you have already taken the second pack for ten days, you should be adequately protected against pregnancy, assuming you have taken the pills correctly and consistently.
In summary, while the risk of pregnancy is low due to your consistent use of birth control pills, it is not zero, especially with the missed doses. If you have any doubts or experience any unusual symptoms, it is always best to consult with a healthcare provider. They can provide personalized advice based on your health history and current situation. Additionally, understanding how hormonal contraceptives work and their potential interactions with other medications or situations is essential for effective family planning. Always feel free to reach out to a healthcare professional for guidance on contraceptive methods and reproductive health.

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