Can You Confirm Pregnancy After Taking Emergency Contraceptive? - Obstetrics and Gynecology

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Can a pregnancy test taken more than two weeks after taking emergency contraception determine if the contraception was successful? I took the pill right after sexual intercourse, but it has been over a week and I still haven't gotten my period.
My previous two situations were: I took the emergency contraceptive on February 14, got my period on February 20, had my period on March 13, and took the emergency contraceptive again on March 22, with my period on March 28 (I'm unsure if the first two instances were withdrawal bleeding).
After taking the emergency contraceptive on April 6, I still haven't gotten my period.
Is there a possibility that I could be pregnant? If I am pregnant, what should I do?

Xiao Wang, 20~29 year old female. Ask Date: 2006/04/17

Dr. Huang Jianxun reply Obstetrics and Gynecology


Hello: It is advisable not to use emergency contraception as a regular method of birth control, as emergency contraceptive pills contain high doses of hormones.
You should still take a pregnancy test if your period is late to confirm whether contraception has failed.
Sincerely, Dr.
Huang Chien-Hsun, Obstetrics and Gynecology.

Reply Date: 2006/04/17

More Info


When it comes to confirming pregnancy after taking emergency contraceptive pills (ECPs), it's important to understand how these medications work and their effectiveness. Emergency contraceptive pills, such as Plan B or Ella, are designed to prevent pregnancy after unprotected intercourse. They work primarily by delaying ovulation, which means that if you take them before ovulation occurs, they can effectively prevent the sperm from fertilizing an egg. However, if ovulation has already occurred, ECPs may not be effective.

In your case, since you took the emergency contraceptive pill shortly after unprotected intercourse, there is a possibility that it worked to prevent pregnancy. However, if you are experiencing a delay in your menstrual cycle beyond what is typical for you, it is advisable to take a pregnancy test to confirm whether or not you are pregnant. Most home pregnancy tests are reliable and can detect pregnancy about one week after a missed period. If you took the ECP and your period is late, waiting at least two weeks after taking the pill to test can provide a more accurate result.

Regarding your previous experiences with ECPs and your menstrual cycle, it is possible that the bleeding you experienced after taking the pills was withdrawal bleeding, which can occur as a result of hormonal changes induced by the ECPs. This withdrawal bleeding can sometimes mimic a menstrual period but may not be a true period. The timing and nature of your bleeding can vary significantly from cycle to cycle, especially after taking ECPs.

If you suspect that you might be pregnant, the best course of action is to take a home pregnancy test. If the test is positive, you should schedule an appointment with a healthcare provider to discuss your options moving forward. If the test is negative but your period does not arrive, it is still advisable to consult with a healthcare professional to rule out any other underlying issues.

In terms of handling a confirmed pregnancy, if you find out that you are pregnant, you will need to consider your options, which may include continuing the pregnancy or discussing termination options with a healthcare provider. It is essential to have a supportive environment and access to accurate information to make the best decision for your circumstances.

If you have consumed alcohol or engaged in other activities that may concern you during the early stages of pregnancy, it is important to discuss these with your healthcare provider. They can provide guidance on any potential risks and what steps you can take to ensure the health of your pregnancy moving forward.

In summary, while ECPs are effective in preventing pregnancy when taken correctly, they are not 100% foolproof. If you are experiencing a delayed period after taking ECPs, taking a pregnancy test is the next logical step. Regardless of the outcome, consulting with a healthcare provider will help you navigate your options and ensure that you receive the appropriate care.

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