Pregnancy Chances After Unprotected Intercourse: Key Insights

Probability of Pregnancy

Hello Doctor, my menstrual periods last month and the month before started on the 26th, and they have been very regular.
I experience unilateral lower abdominal pain during ovulation.
Last month's period started on the 26th and ended on the 3rd, with only a small amount of brown discharge remaining on the 3rd.
I had unprotected intercourse with my boyfriend, and before penetration, I wiped off the secretions from the glans.
He withdrew and ejaculated on my abdomen.
Starting on the evening of the 11th, I began to feel unwell with dizziness, stomach discomfort, and lower abdominal pain.
The discharge was yellowish-white and dry.
On the afternoon of the 12th, I had a slight aversion to food smells, but it only happened once.
The app indicates that my ovulation period was from the 8th to the 14th, with the ovulation day on the 13th.
I would like to ask the doctor if my discomfort could possibly be due to pregnancy? Is there a significant chance of pregnancy if intercourse occurred on the last day of my period without protection?

Wu, 10~19 year old female. Ask Date: 2024/03/12

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, the likelihood of pregnancy should be low; just monitor the situation.
Wishing you good health.

Reply Date: 2024/03/12

More Info

Understanding the chances of pregnancy after unprotected intercourse is crucial for anyone who is sexually active, especially when considering the timing of ovulation and menstrual cycles. Based on the details you've provided, let's break down the situation.

1. Menstrual Cycle and Ovulation: You mentioned that your menstrual cycle is regular, with your last period starting on the 26th and lasting until the 3rd. Ovulation typically occurs about 14 days before the start of your next period. Given your cycle length, if we assume a 28-day cycle, ovulation would likely occur around the 10th of the month. Since you had unprotected intercourse on the last day of your period (the 3rd), the chances of pregnancy are relatively low, but not impossible. Sperm can survive in the female reproductive tract for up to five days, so if you ovulated earlier than expected, there is a slight chance that sperm could still be viable.

2. Symptoms of Pregnancy: The symptoms you are experiencing—dizziness, gastrointestinal discomfort, and changes in discharge—can be indicative of several conditions, including early pregnancy, hormonal changes, or even premenstrual syndrome (PMS). However, these symptoms alone are not definitive indicators of pregnancy. The only way to confirm pregnancy is through a pregnancy test, which detects the hormone hCG (human chorionic gonadotropin) in your urine or blood.

3. Timing of Testing: If you suspect you might be pregnant, it is advisable to wait until at least the first day of your missed period to take a home pregnancy test for the most accurate result. Testing too early can lead to false negatives, as hCG levels may not be high enough to detect.

4. Risk of Pregnancy: Given that you had unprotected intercourse at the end of your menstrual period, the risk of pregnancy is lower than if you had intercourse during your fertile window (around ovulation). However, since sperm can survive for several days, there is still a possibility, albeit reduced.

5. Next Steps: If your symptoms persist or if you miss your next period, consider taking a home pregnancy test. If the test is positive or if you have concerns about your symptoms, it would be wise to consult a healthcare provider for further evaluation and guidance.

6. Contraceptive Considerations: If you are not planning to conceive, it is essential to consider reliable contraceptive methods to prevent unintended pregnancies in the future. There are various options available, including hormonal contraceptives, barrier methods, and long-acting reversible contraceptives (LARCs).

In summary, while the chances of pregnancy from the intercourse described are relatively low, they are not zero. Monitoring your symptoms and taking a pregnancy test at the appropriate time will provide clarity. If you have further concerns or questions about your reproductive health, seeking advice from a healthcare professional is always a good step.

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Hello, the chances of pregnancy should be low. Wishing you good health.

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