Pregnant women who are positive for group B streptococcus need to be treated with penicillin late in pregnancy or after labor, and it is possible to have a normal delivery after regular treatment with penicillin. Group B streptococcus infection is one of the main causes of premature rupture of membranes and uterine infections, so it is necessary to check for group B streptococcus in late pregnancy. Pregnant women are usually tested by taking vaginal secretions during the 32-36 weeks of pregnancy; if the test is positive for B streptococcus, the next step of treatment should be decided according to the symptoms; if the pregnant woman has symptoms of vaginitis such as itchiness, odor, and increased secretions, penicillin should be applied under the guidance of the doctor. If there are no symptoms, there is no need for treatment for the time being, and penicillin will be used again after labor, and the regular use of penicillin treatment will not affect the mode of delivery, so you can have a normal delivery. Female friends must pay attention to the hygiene of the vulva after pregnancy, wash with warm boiled water every day, wear loose cotton underwear; there are abnormal secretions need to go to the hospital.