Gram-positive bacteria, not viruses, can normally exist in the human gastrointestinal tract and vagina, mostly occurring in pregnant women, low immunity occurs after the bacterial imbalance, will be infected through vertical transmission to the fetus.
Gram-positive bacteria can normally exist in the female vagina and rectum, which is a normal flora, but when pregnant women have low immunity and weak resistance, they can become conditionally pathogenic bacteria and infect the fetus through vertical transmission, resulting in intrauterine infections, miscarriages and obstructed labor.
Therefore, pregnant women must be screened for Gram-positive bacterial infections in late pregnancy and labor, and once infection occurs, they should be actively regulated under the guidance of doctors.