Pregnancy Chances After Unprotected Intercourse: Key Insights

What is the likelihood of getting pregnant?

On September 24, my period started and ended on September 28.
From October 1 to October 5, I had sexual intercourse, using a condom.
On October 4, the app indicated that I was in my fertile window, so I took emergency contraception after intercourse that night.
On the morning of October 5, I had intercourse again, also using a condom.
Ten days later, I was anxious and took a pregnancy test, which showed one line within about three minutes.
Does this mean there is a high chance of pregnancy? I am very worried.
I have been tracking my basal body temperature, which has been below 36 degrees Celsius.
My breast color appears normal, and there hasn't been an increase in discharge.
My appetite hasn't changed, and I go to the bathroom about six times a day.
I have a scratchy throat, and sometimes I cough and feel nauseous.
I also have nasal congestion and phlegm in my throat.
Are these symptoms significant, or do they resemble a cold?

Wo, 10~19 year old female. Ask Date: 2019/10/15

Dr. Huang Jianzhong reply Obstetrics and Gynecology

On September 24, menstruation started and ended on September 28.
From October 1 to October 5, there were sexual encounters with protection.
On October 4, the app indicated the start of the fertile period, so after the encounter that night, emergency contraception was taken.
On October 5 in the morning, there was another sexual encounter with protection.
Ten days after the encounter, feeling anxious, a pregnancy test was taken, which showed one line within about three minutes.
Is the chance of pregnancy high? Answer: The chance of pregnancy is not high.

Additionally, I have been monitoring my basal body temperature, which is below 36 degrees Celsius.
My breast color is normal, and there hasn't been an increase in discharge.
My appetite hasn't changed, and I use the restroom about six times a day.
I have a scratchy throat, and sometimes I feel nauseous when coughing.
I have nasal congestion and phlegm in my throat; could these be considered symptoms, similar to a cold?

Reply Date: 2019/10/15

More Info

Understanding the chances of pregnancy after unprotected intercourse can be a source of anxiety for many individuals, especially when there are various factors at play. Based on your description, it seems you have taken several precautions, including using condoms and taking emergency contraception. Let's break down the situation to provide clarity and insights.

1. Timing of Intercourse and Ovulation: The menstrual cycle typically lasts about 28 days, but it can vary. Ovulation usually occurs around 14 days before the start of your next period. If your cycle is regular, having intercourse during your "dangerous" period (the time when you are most fertile) does increase the chances of pregnancy. However, since you mentioned using a condom during intercourse on October 5th, this significantly reduces the likelihood of sperm reaching the egg.

2. Emergency Contraception: You mentioned taking emergency contraception (the "morning-after pill") after unprotected intercourse. These pills are most effective when taken as soon as possible after unprotected sex, ideally within 72 hours, but they can work up to 5 days after. They work primarily by delaying ovulation, preventing fertilization, or preventing a fertilized egg from implanting in the uterus. If taken correctly, the chances of pregnancy are greatly reduced.

3. Pregnancy Testing: You took a pregnancy test 10 days after the last intercourse, which is a reasonable timeframe. Most home pregnancy tests are designed to detect the hormone hCG (human chorionic gonadotropin) in urine, which typically becomes detectable about a week after a missed period. A single line on the test usually indicates that you are not pregnant. However, if you still have concerns, consider retesting a few days later or consulting a healthcare provider for a blood test, which can detect pregnancy earlier and more accurately.

4. Symptoms and Body Changes: You mentioned several symptoms, such as a low body temperature, normal breast appearance, and changes in your throat and nasal passages. These symptoms could be related to a common cold or allergies rather than pregnancy. It's important to note that early pregnancy symptoms can often mimic premenstrual symptoms or other conditions, leading to confusion.

5. Next Steps: If you remain anxious about the possibility of pregnancy, consider scheduling an appointment with a healthcare provider. They can provide a more comprehensive evaluation, including a blood test for pregnancy and advice on your symptoms. Additionally, they can discuss contraceptive options to help you feel more secure in the future.

In summary, while the chances of pregnancy seem low given your precautions and the negative pregnancy test, it's understandable to feel anxious. Monitoring your body and seeking professional advice can provide peace of mind. Remember, it's always best to consult with a healthcare professional for personalized guidance tailored to your specific situation.

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