STD Infection Risks After Protected Sex: Key Insights - Urology

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Probability of sexually transmitted infection (STI) transmission?


Hello, doctor.
Before asking my question, I have already read most articles, but there is little content that addresses my concerns, so I still want to ask for your advice! About nine days ago (on August 8), I had sexual intercourse with a male online friend (without oral sex).
We used a condom throughout the encounter, and there were no incidents of it slipping off or breaking.
We ended the activity early to take a shower.
However, afterward, I felt uneasy and worried about the possibility of contracting a sexually transmitted infection (STI).
Although I have been monitoring myself for nine days and have not noticed any symptoms of STIs, I occasionally have yellow discharge, but it is not daily.
In recent days, the discharge has been very minimal, almost nonexistent, and I had some before the encounter as well.
I would like to ask how likely it is that I contracted an STI in this situation.
To my knowledge, my partner is someone who pays attention to hygiene and maintains a regular exercise routine.
He has previously donated blood, and it seems that his current profession does not allow individuals with STIs to apply.
I wonder if these factors could influence and lower the risk of infection?

HG, 20~29 year old female. Ask Date: 2018/08/08

Dr. Chen Jiansheng reply Urology


Having a fixed sexual partner can reduce the risk of sexually transmitted infections (STIs).

Reply Date: 2018/08/08

More Info


When it comes to understanding the risks of sexually transmitted diseases (STDs) after engaging in protected sex, it’s essential to consider several factors, including the type of sexual activity, the effectiveness of the protection used, and the overall health status of both partners.

In your case, you mentioned that you had protected sex using a condom and that there were no incidents of the condom slipping off or breaking. This is a significant factor because when used correctly, condoms are highly effective in reducing the risk of transmitting most STDs, including HIV, gonorrhea, and chlamydia. However, it is important to note that while condoms significantly lower the risk, they do not eliminate it entirely.
One of the primary concerns with condom use is the potential for improper usage or failure. If the condom was applied correctly and remained intact throughout the sexual encounter, the risk of STD transmission is considerably low. However, if there was any moment during the sexual activity where the condom may have been compromised, such as during withdrawal or if it was not fitted properly, there could be a risk of exposure.

You also mentioned experiencing occasional yellow discharge, which you noted was not a new symptom and had been present prior to the encounter. This could be related to a variety of non-STD conditions, such as a mild infection or irritation. It is important to monitor any changes in symptoms, especially if they persist or worsen. If you notice any additional symptoms such as pain, itching, or a significant increase in discharge, it would be advisable to consult a healthcare provider for further evaluation.

Regarding your partner’s background, while factors such as personal hygiene and regular health check-ups can contribute to lower risks, they do not guarantee that an individual is free from STDs. It is essential to remember that many STDs can be asymptomatic, meaning that a person can carry and transmit an infection without showing any signs or symptoms. Therefore, even if your partner has a clean lifestyle and has previously donated blood, it does not completely rule out the possibility of infection.

In terms of STD testing, it is generally recommended to get tested after any new sexual encounter, especially if there is any concern about potential exposure. The timing of testing is also crucial; for some STDs, it may take time for the body to produce detectable antibodies. For example, testing for HIV is typically recommended at 2-4 weeks after exposure, with follow-up testing at 3 months for conclusive results. Other STDs, such as gonorrhea and chlamydia, can often be tested for sooner, typically within a week or two after exposure.

In conclusion, while the use of condoms significantly reduces the risk of STD transmission, it is not foolproof. Given your situation, if you have any lingering concerns or symptoms, it would be wise to seek medical advice and consider getting tested for STDs. Regular screenings are a responsible practice for anyone who is sexually active, particularly when engaging in new sexual relationships. Always prioritize open communication with partners about sexual health and testing to ensure mutual safety and well-being.

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