Pregnancy Chances After Unprotected Oral Sex: Key Insights

Consolidated Data on Pregnancy Probability

Hello doctor, three weeks ago I engaged in mutual oral sex and I'm concerned about the possibility of urethral bulbourethral gland fluid leading to pregnancy.
Four days later, I took emergency contraception (missing the 72-hour window significantly reduces the chance of effectiveness).
After six days, I experienced heavy bleeding similar to menstruation that lasted for a week, followed by four days of light brown discharge or spotting.

Counting from the day I might have conceived, it has been 16 days.
I took a pregnancy test in the afternoon after not drinking or eating for the previous five hours, and the result was negative.
However, my abdomen continues to enlarge, and my weight fluctuates.
I frequently feel the urge to burp and pass gas.
I understand that the chances of pregnancy are extremely low, and symptoms like abdominal enlargement could be caused by other factors, but I'm still worried about the slight possibility of being pregnant.

What is your professional advice? Should I take another pregnancy test, or can I feel completely reassured based on the information provided? Thank you for your patient response.
I hope to resolve this matter soon.
Thank you very much.

Xin, 10~19 year old female. Ask Date: 2015/08/17

Dr. Lü Lizheng reply Obstetrics and Gynecology

1.
If menstruation occurs a few days after sexual intercourse, pregnancy is unlikely.
2.
A pregnancy test also shows negative, further confirming that there is no pregnancy.
3.
If there are still concerns, you can take another test after a week.
Sincerely, Dr.
Li-Cheng Lu, Taoyuan Hospital.

Reply Date: 2015/08/17

More Info

When it comes to understanding the chances of pregnancy after unprotected oral sex, it is essential to clarify a few key points regarding sexual health and reproductive biology.
First and foremost, oral sex itself does not typically result in pregnancy. Pregnancy occurs when sperm from a male fertilizes an egg from a female, which usually happens through vaginal intercourse. In the scenario you've described, where mutual oral sex occurred, the risk of pregnancy is virtually nonexistent unless sperm was somehow transferred into the vaginal canal, which is highly unlikely in this context.
You mentioned that you took emergency contraception (the "morning-after pill") four days after the encounter. While it is most effective when taken within 72 hours, taking it later can still reduce the risk of pregnancy, although the effectiveness diminishes over time. Since you experienced a menstrual-like bleeding episode a week later, this could be a side effect of the emergency contraception, which can cause changes in your menstrual cycle, including spotting or bleeding that resembles a period.

Regarding your pregnancy test, if you took it 16 days after the encounter and it was negative, it is a strong indicator that you are not pregnant. Pregnancy tests are designed to detect the hormone hCG, which is produced shortly after a fertilized egg implants in the uterus. Testing too early can lead to false negatives, but given the timeline you've provided, a negative result is reassuring.

The symptoms you are experiencing, such as abdominal bloating and fluctuations in weight, can be attributed to various factors unrelated to pregnancy. Stress, hormonal changes, dietary habits, and gastrointestinal issues can all contribute to these sensations. It's also worth noting that anxiety about potential pregnancy can manifest physically, leading to symptoms like bloating or changes in appetite.

If you are still feeling uncertain about your pregnancy status, it may be beneficial to take another pregnancy test. This can provide additional peace of mind. Ensure that you follow the instructions carefully, including the timing of the test, to get the most accurate result.
In summary, based on the information you've provided, the likelihood of pregnancy from the described encounter is extremely low. The negative pregnancy test further supports this. However, if your symptoms persist or if you have any concerns about your reproductive health, it is advisable to consult with a healthcare professional. They can provide personalized advice and may suggest further testing or evaluations if necessary.
Lastly, it’s important to engage in safe sexual practices to minimize the risk of sexually transmitted infections (STIs) and unintended pregnancies in the future. Using protection during all forms of sexual activity is crucial for maintaining sexual health.

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