Pregnancy Chances: What to Know After Unprotected Intercourse

Pregnancy probability

My menstrual cycle is usually 21 days, and it can sometimes be late by one or two days.
My last period was from June 26 to July 2.
I had sexual intercourse on July 9 (the app indicated a high chance of conception that day), but we used a condom and I did penetrate the vagina.
I'm not sure if the condom broke.
I pulled out before ejaculation.
My period was expected to arrive on July 22, but it hasn't come yet.
Could this mean I am pregnant? What is the likelihood of pregnancy?

Han, 10~19 year old female. Ask Date: 2017/07/25

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, the chances of pregnancy are low, but it is best to take preventive measures at all times and not to rely on the safe period.
If your period is overdue by more than a week, it is advisable to see a gynecologist.
Wishing you good health.

Reply Date: 2017/07/25

More Info

When it comes to understanding the chances of pregnancy after unprotected intercourse, several factors come into play. Based on your menstrual cycle, which typically lasts around 21 days, ovulation likely occurs around the middle of your cycle. Given that your last period was from June 26 to July 2, ovulation would typically occur around July 10, making July 9 a day close to your ovulation window. However, since you mentioned that you used a condom during intercourse, this significantly reduces the likelihood of pregnancy, provided that the condom did not break.

The fact that you are experiencing a delay in your menstrual cycle can be concerning, especially if your cycles are usually regular. A missed period can be one of the first signs of pregnancy, but it can also be influenced by other factors such as stress, hormonal imbalances, or changes in your health. Since your expected period was due on July 22 and you have not seen it yet, it is advisable to take a home pregnancy test. These tests are designed to detect the hormone hCG (human chorionic gonadotropin), which is produced during pregnancy. If the test is positive, it indicates that you are likely pregnant. If it is negative and your period still does not arrive, you may want to consult a healthcare provider for further evaluation.

In terms of the likelihood of pregnancy, if the condom did not break and you followed proper usage guidelines, the chances are relatively low. However, no contraceptive method is 100% effective, and there is always a small risk of pregnancy with any form of sexual intercourse. If you are concerned about the possibility of a broken condom, it might be worth considering emergency contraception, which is most effective when taken shortly after unprotected intercourse.

It's also important to consider other factors that could affect your menstrual cycle. Stress, changes in weight, illness, or even changes in your routine can lead to a delayed period. If you have been under stress or have experienced any significant changes in your life recently, this could also explain the delay.

In summary, while the likelihood of pregnancy seems low due to the use of a condom, the missed period warrants further investigation. Taking a home pregnancy test is a straightforward next step to clarify your situation. If you have any concerns or if the test is positive, seeking advice from a healthcare professional is recommended to discuss your options and ensure your health and well-being.

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