When you’re trying to get pregnant, it’s easy to focus on ovulation tests, cycle tracking, and timing sex. Vaginal health often falls to the bottom of the list until something feels “off” - itching, burning, unusual discharge, or a smell you don’t recognize.
Most vaginal infections won’t make you infertile on their own. But some can lower your odds of conceiving in the short term, raise your risk of early pregnancy problems, or signal an infection that can spread upward and harm your tubes. The key is knowing which infections matter most for fertility, what symptoms to take seriously, and what steps help you clear the problem fast and safely.
First, what counts as a vaginal infection?
People use “vaginal infection” to describe a few different issues. Some are true infections caused by bacteria, yeast, or parasites. Others are shifts in the vaginal microbiome (the mix of germs that normally live there). The vagina isn’t sterile. In fact, healthy vaginas usually have a lot of lactobacilli bacteria, which help keep the pH low and make it harder for harmful germs to grow.
Common problems that get lumped together include:
- Yeast infection (vulvovaginal candidiasis)
- Bacterial vaginosis (BV)
- Trichomoniasis (a sexually transmitted infection)
- Cervicitis (inflammation of the cervix, often from an STI)
- Chlamydia and gonorrhea (STIs that can affect the cervix and uterus, and can lead to pelvic inflammatory disease)
Some of these start in the vagina, some start in the cervix, and some can move up into the uterus and tubes. That “moving up” part is where fertility risks rise.
How vaginal infections can affect fertility when trying to conceive
They can make sex painful or less likely
If you have burning, itching, swelling, or pain, you may avoid sex or rush through it. That alone can cut your chances during your fertile window. Even if you push through, irritation can make tiny tears more likely, which can increase the risk of catching or passing infections.
They can change cervical mucus
Cervical mucus matters because sperm need it to survive and travel. Some infections and microbiome shifts can change mucus in ways that make sperm movement harder. BV, for example, often comes with a higher vaginal pH, and sperm do better in a supportive mucus environment.
They can trigger inflammation that interferes with conception
Inflammation doesn’t always stay local. When the cervix or upper reproductive tract gets inflamed, it can affect sperm transport, egg pickup by the tubes, and early embryo development.
Some infections can scar the fallopian tubes
This is the biggest fertility concern. Untreated chlamydia or gonorrhea can lead to pelvic inflammatory disease (PID). PID can scar the fallopian tubes, raising the risk of infertility or ectopic pregnancy. The tricky part is that chlamydia often has no symptoms, so people don’t know they need treatment.
For background on PID and how it affects reproductive organs, see the CDC’s overview of pelvic inflammatory disease.
They can raise the risk of early pregnancy complications
Even if conception happens, certain infections (or an imbalanced vaginal microbiome) may raise the risk of miscarriage or preterm birth. This doesn’t mean you should panic after one infection. It means you should treat symptoms early and ask your clinician what follow-up you need if you’ve had repeat infections.
Which infections matter most for fertility?
Bacterial vaginosis (BV)
BV isn’t a classic “catch it from someone” infection. It’s a shift in bacteria, where lactobacilli drop and other bacteria increase. Many people notice a thin gray or white discharge and a fishy smell, often stronger after sex. Some have no symptoms.
BV doesn’t usually cause infertility by itself, but it can:
- Make the vaginal environment less friendly to sperm
- Increase the risk of catching STIs
- Link with pregnancy complications in some studies
If you’re trying to conceive and you keep getting BV, that’s worth addressing with a clinician instead of self-treating over and over. The Mayo Clinic summary of BV gives a clear rundown of symptoms and typical treatment.
Yeast infections
Yeast infections are common and miserable, but they rarely affect fertility directly. They can still get in the way because sex may hurt, and some treatments can be messy during timed intercourse.
Watch for:
- Thick white discharge (often described as clumpy)
- Itching and redness
- Burning with urination or sex
If you’re getting frequent yeast infections (four or more a year), ask for a proper diagnosis. People often assume “itching equals yeast,” but BV, dermatitis, or even an STI can feel similar. Getting the right test saves time and protects your fertility plan.
Trichomoniasis
Trich is an STI caused by a parasite. It can cause yellow-green frothy discharge, odor, itching, and pain with sex, but many people have mild symptoms or none.
Trich matters when trying to conceive because it can cause inflammation and raise the risk of other infections. The good news is it’s treatable, and partners need treatment too to prevent ping-pong reinfection. For details, the Office on Women’s Health page on trichomoniasis is straightforward and practical.
Chlamydia and gonorrhea
These are the heavy hitters for fertility risk. They may start at the cervix and cause abnormal discharge or bleeding after sex, but many people feel fine. Untreated, they can travel to the uterus and tubes and cause PID, which can lead to scarring.
If you’re trying to conceive, screening matters even if you feel well, especially if:
- You’re under 25
- You have a new partner
- You or your partner have more than one partner
- You’ve had an STI before
For screening and prevention recommendations, you can check the USPSTF guidance on STI screening.
Symptoms you shouldn’t ignore when trying to conceive
Some changes are normal across the cycle. But these symptoms deserve a call to your clinician or a visit to a sexual health clinic:
- Strong fishy odor, especially after sex
- Green, yellow, or gray discharge
- Bleeding after sex
- Pelvic pain or pain during sex
- Burning with urination plus vaginal symptoms
- Itching and swelling that doesn’t improve within a few days
- Fever, chills, or lower belly pain (urgent)
Trying to self-diagnose often backfires. Many infections share symptoms, and using the wrong over-the-counter product can make irritation worse.
Getting the right diagnosis fast
If you’re dealing with possible vaginal infections affecting fertility when trying to conceive, speed and accuracy matter more than guessing. A good visit usually includes:
- A symptom history (timing, triggers, new partner, new products)
- A pelvic exam when needed
- Vaginal pH testing
- Microscopy or rapid tests
- NAAT testing for STIs (highly accurate lab tests)
Ask directly what they tested for and when you’ll get results. If you’ve had repeat infections, ask whether you should test for STIs even if you’re in a long-term relationship. People can carry infections for months without knowing.
Treatment choices that fit TTC life
BV treatment
Clinicians often treat BV with metronidazole (oral or gel) or clindamycin (cream). If you’re trying to conceive, ask:
- Whether you should avoid sex during treatment
- Whether your partner needs testing (usually not for BV, but ask if you also have STI risk)
- What to do if it comes back within a month
Don’t douche or use “vaginal detox” products. They often make BV more likely to recur.
Yeast treatment
For yeast, many people use an OTC azole cream or suppository. If you’re TTC, it’s smart to confirm it’s yeast before you treat. If you might already be pregnant, ask your clinician which options are safest.
Avoid using leftover antibiotics “just in case.” Antibiotics can trigger yeast and won’t treat yeast.
STI treatment and partner treatment
For trich, chlamydia, and gonorrhea, you need prescription treatment. Your partner needs treatment too. You’ll also need guidance on when it’s safe to have sex again.
After treatment, ask whether you need a test-of-cure (repeat testing) or retesting in a few months. This step prevents silent reinfection that can drag on and increase fertility risk.
Can probiotics help, or is that hype?
Probiotics can help some people, but they aren’t a cure-all. The evidence looks most promising for certain lactobacillus strains for BV prevention, often as a support after standard treatment. But products vary a lot, and many don’t contain the strains used in studies.
If you want to explore this, the International Society for Sexual Medicine discussion on probiotics and BV offers a grounded overview. Use it to frame questions for your clinician, not as a reason to skip testing or antibiotics when you need them.
Habits that lower your risk of repeat infections
You can’t control everything. Hormones, stress, and even semen can shift vaginal pH. Still, a few habits help many couples:
Keep products simple
- Skip scented washes, sprays, and wipes
- Wash the vulva with warm water or a mild, unscented cleanser
- Avoid douching
Use condoms if you’re treating an infection or keep getting BV
If you’re in active TTC mode, condoms may not fit every cycle. But short-term condom use can help break a cycle of irritation or reinfection while you treat and recover. Some couples use condoms outside the fertile window and go condom-free during peak days.
Rethink lubricants
Many lubes harm sperm or irritate vaginal tissue. If you need lube, choose one labeled “fertility-friendly.” For a practical starting point, ASRM’s patient info on lubricants and fertility explains why ingredient choice matters.
Don’t ignore your partner’s symptoms
Penile irritation, discharge, or burning urination needs evaluation too. Even without symptoms, partners may need testing and treatment for STIs and trich.
Time sex around treatment, not through it
If sex hurts or you’re using vaginal medication, pause. You don’t lose your chance forever by skipping a few days. You protect your tissue, lower inflammation, and reduce the odds of passing an infection back and forth.
When to get extra fertility workup
If you’ve had one yeast infection or a single bout of BV, you likely don’t need a fertility clinic. But you should push for more support if any of these apply:
- You’ve had chlamydia, gonorrhea, or PID in the past
- You’ve had pelvic pain, fever, and abnormal discharge that might have been PID
- You’ve tried to conceive for 12 months (or 6 months if you’re 35 or older)
- You have repeat BV or repeat trich despite treatment
Ask your OB-GYN or fertility specialist about STI screening, ultrasound, and whether a tubal patency test (such as an HSG) makes sense for you. If you want a simple way to check when to seek help, RESOLVE’s guide on when to see a fertility specialist is a useful benchmark.
Where to start this week if you’re worried
- Write down your symptoms, when they started, and anything new (sex partner, soap, antibiotics, lube).
- Book a visit for testing instead of self-treating if symptoms are new, severe, or keep coming back.
- Ask for STI testing if you haven’t had it recently, even if symptoms seem “like yeast.”
- If you’re on treatment, follow the full course and ask when sex is safe again.
- Talk with your partner about symptoms and testing so you don’t trade the infection back and forth.
If you handle vaginal infections quickly and get the right tests, most couples can move forward with trying to conceive without a long delay. The goal isn’t perfection. It’s keeping infection and inflammation from becoming the thing that quietly steals months from your timeline. Looking ahead, treat symptoms early, keep your care team in the loop, and build habits that support a stable vaginal microbiome so you can focus on the bigger task of getting pregnant.
