Pregnancy Chances After Unprotected Intercourse: Key Insights

Is the probability high?

The average menstrual cycle is 24 days, with menstruation lasting about 6 days.
The expected ovulation date is December 24.
My period started on December 16, and I attempted intercourse with my boyfriend on December 17 (without a condom, and he only penetrated slightly for less than a minute).
Prior to this, I performed oral sex on him about half an hour to an hour before, during which he ejaculated.
Is there a high chance of pregnancy? Today, December 22, my period has ended, but I still feel a dull ache in my abdomen with sharp pain and lower back discomfort, as well as breast tenderness.
Is this psychological, or could it be a sign of pregnancy? Should I take a pregnancy test? If so, when should I take it? I'm really anxious.
Thank you, doctor, for taking the time to respond.

Niming, 10~19 year old female. Ask Date: 2022/12/22

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, you should not be pregnant.
Wishing you good health.

Reply Date: 2022/12/22

More Info

Understanding the chances of pregnancy after unprotected intercourse can be a source of anxiety for many individuals, especially when there are physical symptoms or uncertainties involved. In your case, let's break down the situation based on the details you've provided.

Firstly, you mentioned that your menstrual cycle averages 24 days, with your last period starting on December 16. Given that ovulation typically occurs about 14 days before the start of your next period, your estimated ovulation date would be around December 24. Engaging in unprotected intercourse on December 17, just a week before your expected ovulation, does present a possibility for pregnancy. Sperm can survive in the female reproductive tract for up to five days, which means that if you ovulate around December 24, there is a chance that sperm from the intercourse on December 17 could fertilize an egg.

Regarding your physical symptoms—such as abdominal discomfort, lower back pain, and breast tenderness—these can indeed be associated with early pregnancy. However, they can also be attributed to premenstrual syndrome (PMS) or other factors unrelated to pregnancy. It’s not uncommon for individuals to experience heightened awareness of bodily sensations during this time, which can lead to psychological stress and anxiety about potential pregnancy.

To determine if you are pregnant, it is advisable to take a home pregnancy test. The best time to take a pregnancy test is after you have missed your period, as this allows for the most accurate results. Since your cycle is relatively short, if your period does not arrive around the expected date (approximately January 9), you should consider testing then. If you test too early, you may receive a false negative result, as the hormone hCG, which is produced during pregnancy, may not be at detectable levels yet.

If you do decide to take a test and it comes back positive, or if you continue to experience symptoms and are concerned, it would be wise to schedule an appointment with a healthcare provider. They can offer further testing, such as a blood test, which can detect pregnancy earlier than a urine test and provide more definitive results.

In summary, while there is a possibility of pregnancy given the timing of your unprotected intercourse, the symptoms you are experiencing could also be related to other factors. Taking a pregnancy test after your expected period is the best course of action to clarify your situation. If you have further concerns or if the symptoms persist, consulting with a healthcare professional is recommended for personalized advice and support.

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