When Should I Test for STDs?
Last updated: Jun 30, 2025
In general, it is advisable to get tested for sexually transmitted diseases (STDs) if you are sexually active. Factors that increase your risk of sexually transmitted infections (STIs) include having multiple partners, engaging in unprotected sex, or having a history of STDs. Regular testing helps with early detection and treatment, which can reduce the chances of complications and transmission to others. It is important to note that common STDs such as chlamydia and gonorrhoea can often be without symptoms. This highlights the importance of testing regularly. Understanding when to test for STDs helps you maintain your sexual health and can provide peace of mind.


High-Risk Sexual Behaviours
STD testing is generally recommended for:
- Everyone at least once
- People with new or multiple sexual partners
- People who engage in casual sex and/or unprotected sex
- People diagnosed with Human Immunodeficiency Virus (HIV)
- Women aged 21 years and above, or below 25 years and are sexually active
- Pregnant women
In Singapore, this is especially important for young adults, given that those aged between 20-34 years had the highest rate of STIs in 2017 according to a Ministry of Health (MOH) report. Prompt testing is important for this age group to prevent the spread of infection and potential long-term health complications.

STD Window Periods and Potential Symptoms
STDs have varying window periods, which is the time after being exposed before a test can detect an infection in the body:
Type of STD | Window Period for Testing |
---|---|
Chlamydia and Gonorrhoea | 24 hours to 6 days |
Syphilis | 3 to 6 weeks |
Herpes | 4 to 6 weeks |
Hepatitis |
Hepatitis A: 2 to 7 weeks Hepatitis B: 6 weeks Hepatitis C: 8 to 9 weeks |
Human Immunodeficiency Virus (HIV) | 14 days |
Some common STDs symptoms can include:
- Unusual genital discharge
- Pain when urinating
- Fever
- Fatigue
- Loss of weight
- Sores
- Rash or itching
- Swollen lymph nodes in the neck
It is important to understand that these symptoms may be caused by other health conditions. However, if you experience these symptoms and are worried about a possible infection, please consult your doctor to obtain an accurate diagnosis and appropriate treatment.

Asymptomatic Infections and Routine Testing
Many STDs, particularly chlamydia and gonorrhoea, often show no symptoms. If left untreated, this can lead to serious long-term health issues, such as pelvic inflammatory disease (PID) in women, which can cause infertility and chronic pain, and epididymitis in men, affecting sperm-carrying tubes. Regular STD testing is your best defence as it allows for early detection and treatment, preventing complications and reducing the risk of transmission. While annual testing is recommended for most sexually active individuals, those at higher risk such as having multiple partners or engaging in unprotected sex should consider more frequent testing.

Testing During Pregnancy
Pregnant women should test for STDs as part of their prenatal care. Untreated STDs can lead to complications such as transmission to the baby, miscarriage or stillbirth, preterm labour and delivery, low birth weight, or congenital anomalies. Timely testing and treatment during pregnancy are viral for both maternal and infant health.

Summary
Regular and prompt testing is crucial to ensuring optimal sexual health. By understanding your risk level and the window periods for STDs, you can make informed decisions about testing. Since most infections may be asymptomatic, regular testing is essential for early detection and treatment to prevent complications. Protect yourself and your partners by getting tested for STDs promptly if you are at risk or concerned about being infected.
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