Emergency Contraceptive Pills: Am I Pregnant If My Period Is Late?

If you take emergency contraceptive pills, is there a chance of getting pregnant if your period hasn't arrived yet?

Hello doctor, I had intercourse on October 29th using a condom, and while the semen was inside the condom, it broke halfway when I pulled out.
I'm worried that some semen may have entered my body.
I immediately bought and took emergency contraception because I calculated my ovulation period using a mobile app and determined it was a high-risk time.
It has been seven days since I took the emergency contraception, but my period hasn't arrived, and I haven't experienced any bleeding.
Could I be pregnant? My last period started on October 17th, so should I expect my period around November 17th this month as well? My periods are usually late.
Will taking emergency contraception affect my menstrual cycle?

Ting, 20~29 year old female. Ask Date: 2016/11/04

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, emergency contraceptive pills can sometimes cause irregular menstruation.
It is best to use preventive measures beforehand.
If your period is more than a week late, it is advisable to see a gynecologist.
Wishing you good health.

Reply Date: 2016/11/04

More Info

When it comes to emergency contraceptive pills (ECPs), it's important to understand how they work and what to expect after taking them. ECPs are designed to prevent pregnancy after unprotected intercourse or contraceptive failure, such as a broken condom. They are most effective when taken as soon as possible after the incident, ideally within 72 hours, but some types can be taken up to 5 days later.

In your case, you had unprotected intercourse on October 29, and although you used a condom, it broke, which raises concerns about potential sperm exposure. You took emergency contraception shortly after, which is a proactive step. However, it's essential to note that ECPs can cause changes in your menstrual cycle.
After taking ECPs, some women may experience a delay in their next period, while others may have their period come earlier or experience spotting. The hormonal changes induced by the pills can disrupt your regular cycle, leading to irregularities. Given that your last menstrual period started on October 17, your expected period for November would typically be around November 17. However, since you mentioned that your periods are often irregular, it may be challenging to pinpoint exactly when to expect your next period.

If your period is late, it does not automatically mean you are pregnant, especially since ECPs can alter the timing of your menstrual cycle. However, if your period does not arrive within a week or so after the expected date, it would be wise to take a home pregnancy test for confirmation. These tests are designed to detect the hormone hCG, which is produced during pregnancy, and they are most accurate when taken after a missed period.

If the test is positive, it would indicate that you are pregnant, and you should follow up with a healthcare provider for further evaluation and guidance. If the test is negative and your period still does not come, it might be a good idea to consult with a healthcare professional to discuss your symptoms and any further steps you should take.

In summary, while a late period can be concerning, it is not definitive proof of pregnancy, especially after taking emergency contraception. The hormonal effects of the ECPs can lead to delays or changes in your menstrual cycle. If your period does not arrive soon, taking a pregnancy test and consulting with a healthcare provider would be the best course of action to clarify your situation.

Similar Q&A

Understanding Emergency Contraception: Signs of Pregnancy After Use

Hello, I took emergency contraception on February 12, had my period on February 17, took it again on March 15, and now I haven't had my period. Could I be pregnant?

Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, emergency contraceptive pills can sometimes cause irregular menstruation. It is best to take preventive measures beforehand. If your period is more than a week late, it is advisable to see a gynecologist. Wishing you good health.

Am I Pregnant? Understanding Late Periods and Emergency Contraceptives

After taking the emergency contraceptive pill, my period was very late. I went to the gynecologist for an ultrasound, and the doctor said there was nothing abnormal. Later, I was prescribed medication to induce my period, and after taking it, my period came. Does this mean I was ...

Dr. Tian Yiwen reply Obstetrics and Gynecology
The chances of pregnancy are low, but if you are concerned, it is recommended to purchase a home pregnancy test.

Can You Still Get Pregnant After Taking Emergency Contraceptive?

On November 14, I took the emergency contraceptive pill (Plan B) and experienced bleeding similar to a menstrual period on the 20th, although it was slightly lighter than my usual period. Can I still get pregnant? Will my next period arrive on time?

Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, emergency contraceptive pills can sometimes cause irregular menstruation. It is best to use preventive measures beforehand. If your period is more than a week late, it is advisable to see a gynecologist. Wishing you good health.

Pregnancy Concerns: Delayed Period After Taking Emergency Contraceptive

If you had unprotected intercourse on April 21 and took emergency contraception, but your period is now a week late in May, it is possible that you could be pregnant. However, there are other factors that could also cause a delayed period, such as stress, hormonal imbalances, or ...

Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, if you suspect you are pregnant, you can take a pregnancy test. Wishing you good health.