Women are positive for Ureaplasma urealyticum due to normal flora, sexually transmitted infections, and close contact infections. 1. Normal flora: some female Ureaplasma urealyticum exists in the genitourinary tract, usually without any symptoms, when the body’s immune ability to decline or abuse of antibiotics, etc., the situation will be transformed into a condition of the pathogenic bacteria, thus causing the onset of disease. 2. Sexually transmitted: if the male genital tract has pathogenic bacteria, through sex with men will cause cross-infection, thus infected with ureaplasma urealyticum. 3. Close contact infection: close contact with the patient, contact or use of the patient’s contaminated bed linen, underwear, bath towels, toilet and other household items, may also cause cross-transmission, which will lead to female ureaplasma urealyticum positive. If a woman is positive for Ureaplasma urealyticum, she should refrain from having sex if she feels unwell, seek medical advice and follow the doctor’s instructions.