Pregnancy Chances After Unprotected Intercourse and Medication - Obstetrics and Gynecology

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Are you pregnant?


Hello, doctor.
My last menstrual period was from September 27 to October 5.
My ovulation period was around October 15 to 21.
During this time, I had sexual intercourse with my boyfriend (we used a condom and there was no skin-to-skin contact or penetration).
Afterward, we checked the condom for any damage (as far as I remember, it was intact).
My menstrual app indicates that my period is due on November 3, but as of now, November 10, it still hasn't arrived.
I would like to know if there is a possibility of pregnancy.
Additionally, on November 7, I took medication to induce my period for three days (from November 7 to 9), and I experienced breast tenderness before taking the medication.
However, I found online that breast tenderness can also be a sign of pregnancy.
Could you please advise me on the likelihood of pregnancy? Also, does taking medication to induce menstruation cause dizziness and nausea? Thank you for your help!

N, 20~29 year old female. Ask Date: 2022/11/10

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, the chances of pregnancy should be low.
You can confirm pregnancy with a test.
Generally, after taking menstrual induction medication, your period should come within a week.
Just wait a little longer.
Wishing you good health.

Reply Date: 2022/11/10

More Info


When considering the possibility of pregnancy after unprotected intercourse, it is essential to evaluate several factors, including the timing of ovulation, the use of contraception, and any medications taken that may affect menstrual cycles or pregnancy. Based on your timeline, your last menstrual period was from September 27 to October 5, with an estimated ovulation period between October 15 and 21. You mentioned that you had sexual intercourse during this time, but you used a condom and checked for any breakage, which is a crucial step in preventing unintended pregnancy.

Given that your menstrual tracking app indicates your next period was due on November 3, and you have not yet experienced menstruation as of November 10, there is a possibility of pregnancy. However, the use of a condom significantly reduces this risk, especially if there was no breakage. The fact that you have experienced breast tenderness (often referred to as "sore breasts" or "breast fullness") can be a symptom of premenstrual syndrome (PMS) or early pregnancy, as hormonal changes can cause similar sensations.

You mentioned taking menstrual induction medication from November 7 to 9. These medications can sometimes cause side effects, including nausea and dizziness, which you may be experiencing. It is important to note that while these medications can help induce menstruation, they may also affect your body’s hormonal balance temporarily, which could lead to symptoms that mimic early pregnancy signs.

To assess your pregnancy risk more accurately, consider the following:
1. Timing of Intercourse: If you had intercourse close to your ovulation window, the chances of conception are higher. However, since you used a condom and checked for breakage, this reduces the likelihood of pregnancy.

2. Menstrual Induction Medication: The medications you took may alter your menstrual cycle and could potentially delay your period. If your body is responding to these medications, it may take some time for your cycle to normalize.

3. Pregnancy Testing: If your period does not arrive soon, consider taking a home pregnancy test. These tests are most accurate when taken after a missed period. If you test positive, it would confirm pregnancy; if negative and your period still does not come, consult with a healthcare provider for further evaluation.

4. Consulting a Healthcare Provider: If you continue to experience symptoms such as breast tenderness, nausea, or if you have concerns about your menstrual cycle, it is advisable to consult with a healthcare provider. They can provide guidance, perform a pregnancy test, and discuss any potential side effects from the medications you have taken.

In summary, while there is a possibility of pregnancy given the timing of your sexual activity and the missed period, the use of a condom significantly lowers this risk. The medications you took may also be influencing your menstrual cycle. Monitoring your symptoms and considering a pregnancy test will provide clarity on your situation. If you have further concerns, seeking medical advice is always a prudent step.

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