Having a gray discharge when pregnant is often not normal and is mostly indicative of bacterial vaginitis. Bacterial vaginitis can manifest as a gray discharge along with an ammonia odor, and it is important to go to the hospital for routine leukorrhea as well as a BV test. If bacterial vaginosis is indicated, aggressive treatment is necessary, otherwise prolonged infection can easily lead to premature rupture of the fetal membranes, which can easily lead to miscarriage and preterm delivery. The appropriate medication should be given. After pregnancy, many of them must be seen in the hospital, regardless of the color of the discharge. Some pregnant mothers with combined mycoplasma and chlamydia infections should go to the hospital for culture and drug sensitivity of mycoplasma and chlamydia, and after the examination, the relevant treatment will be given.