ASHA remains an independent, unbiased source of information on sexual health. We are guided by science, not ideology. READ MORE.
ASHA remains an independent, unbiased source of information on sexual health. We are guided by science, not ideology. READ MORE.

American Sexual
Health Association

The Impact of STIs on Fertility

Many hands are placed on a pregnant person's belly

What is fertility? What is infertility?

Fertility is a person’s ability to get pregnant or get someone pregnant. Infertility is defined as the inability to get pregnant.

For straight couples, infertility is often diagnosed when they have been trying to conceive through regular intercourse for at least a year without success. Infertility can stem from factors affecting both men and women. Sometimes, these are related to sexually transmitted infections.

So, how do sexually transmitted infections (STIs) impact fertility?

In people with a vagina, bacterial STIs (most commonly chlamydia or gonorrhea) can cause pelvic inflammatory disease (PID). PID is an infection of the reproductive organs, including the uterus, fallopian tubes, or ovaries. PID is often caused by chlamydia or gonorrhea infection, which are treatable with antibiotics if caught in a timely manner. But if these infections are left untreated, PID can develop. It may cause significant scarring of the uterus, fallopian tubes, and ovaries, making it difficult to get pregnant.

In people with penises, there is growing evidence and research being done on STIs and fertility. One issue is prostatitis (infection of the prostate), which can be caused by bacterial STIs. Prostatitis can cause changes in sperm count and motility.

How common is PID? What about infertility?

A study using national data found that 1 in 7, or 13-14%, of U.S. women report a lifetime history of infertility. But this percentage shoots up to 25% of women reporting infertility if they have a history of PID.

It’s estimated that 2.5 million women in the United States will get PID in their lifetime. While the most common causes of PID are chlamydia or gonorrhea, PID also can be caused by other bacteria.

About Chlamydia and Gonorrhea

In 2023, there were over 1.6 million cases of chlamydia and over 600,000 cases of gonorrhea in the United States.

In many cases, gonorrhea and chlamydia have no symptoms, especially in women. Because of this, they are sometimes called “silent” STIs, because a person can have these infections and not know it. This is why regular testing is crucial if you are sexually active.

If chlamydia and gonorrhea do cause symptoms, these can include:

  • Pain while peeing
  • Pain during sex
  • Abnormal vaginal bleeding or discharge
  • Pelvic pain

How to Protect Your Future Fertility

To protect your fertility, you can take steps to avoid contracting an STI. If you are sexually active, there are ways to have safer sex. Some of these include:

  • Being in a mutually monogamous relationship
  • Getting tested regularly for STIs and making sure your partner(s) are tested as well
  • Using condoms every time you have sex
  • Talking with your partner(s) about safer sex precautions, including condoms and STI testing

Routine testing and treatment of bacterial STIs, along with timely recognition and treatment of PID, are crucial steps in reducing the impact that STI infections may have on future fertility. By being proactive, you can take control of your reproductive health.

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