Ureaplasma urealyticum positivity affects pregnant women, including infection, miscarriage, malformation, and reduced survival rate. 1. Infection: Ureaplasma urealyticum infection is easily transmitted upward through the reproductive tract, leading to infection of the uterine cavity, which affects the growth and development of the fetus. 2. Miscarriage: Ureaplasma urealyticum infection can induce localized chorioamnionitis, resulting in the fetal membranes and amniotic membranes are too fragile, once the contraction is strengthened, spontaneous rupture of the fetal membranes will occur, inducing premature rupture of the fetal membranes, which can easily lead to preterm labor or miscarriage. 3. Malformation: Ureaplasma urealyticum infection may lead to spontaneous abortion or cause fetal malformation. 4. Reduced survival rate: Ureaplasma urealyticum infection may induce amniotic cavity infection, which may easily cause intrauterine hypoxia, affecting the survival rate of newborns after birth. Therefore, pregnant women who are positive for Ureaplasma urealyticum are advised to consult a doctor in time and take active treatment under the guidance of the doctor.