Vaginal Infections During Pregnancy

Group B Strep and Trichomoniasis

Group B Strep (GBS)

What is GBS?

According to Myra Wick, M.D., an ob-gyn at the Mayo Clinic in Rochester, MN, 20 to 25 percent of all healthy woman have GBS bacteria living in their system, usually in the intestinal tract, rectum, or vagina. Your doctor will automatically test you for GBS between weeks 35 and 37 of your pregnancy.

Because many healthy people have GBS living in their bodies, it's unclear why some individuals develop more serious infections from GBS while others do not, according to the Mayo Clinic's website.


GBS may cause a urinary tract infection (UTI) in some people, but others have no symptoms at all. Symptoms of a UTI include pain or burning during urination, cloudy urine, and a sudden urge to urinate.


If you test positive for GBS, you'll receive antibiotics during your delivery so that you don't pass the infection to your baby. (Without antibiotics your baby is at risk for early-onset GBS disease, which causes fever, difficulty feeding, and lethargy.)


Unfortunately, there's no way to prevent GBS.


What is Trichomoniasis?

With an estimated 7.4 million new cases each year, "trich" is one of the most common and most curable sexually transmitted diseases, according to the Centers for Disease Control and Prevention (CDC).

The Cause:

The Trichomonas vaginalis parasite is transmitted sexually and typically lives in the vagina.


  • Greenish-yellow, frothy, foul-smelling discharge
  • Itching, burning, and possible irritation during sexual intercourse


Your doctor will most likely treat you with oral antibiotics such as Metronidazole and Tinidazole.


  • Get tested so that if you or your partner has trich you can get it treated before the other one catches it.
  • Stick to one partner to decrease your chances of being infected with trich.
  • Use a condom to help prevent spreading this infection should you or your partner have it.

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