Inflammatory pelvic disease, especially tubalitis, is one of the main causes of infertility and ectopic pregnancy. There are more factors that cause pelvic inflammatory disease, according to the Center for Disease Control, 90% of pelvic inflammatory disease is related to gonorrhea and Chlamydia trachomatis infection, especially chlamydia infection, it is more likely to induce ectopic pregnancy commonly known as ectopic pregnancy. Chlamydia is a microorganism between bacteria and viruses, and the chlamydia that can infect humans are Chlamydia trachomatis, Chlamydia conjunctivitis, Chlamydia venereal lymphogranuloma, and Chlamydia psittaci. Human trachoma is a common eye disease caused by Chlamydia trachomatis infection, which is an eye-to-eye infection. While Chlamydia trachomatis inclusion body conjunctivitis not only invades the eye, but also can cause male urethritis, epididymitis, prostatitis, female cervicitis, salpingitis and deep pelvic inflammatory disease, so it is related to male infertility and female infertility. Chlamydial infection increases significantly after abortion. Adult infections can be caused by sexual contact between men and women. Transhand-to-eye contact. Hand-to-eye contact, but also from infected swimming pool water, etc. Chlamydia lymphogranuloma venereum is transmitted primarily through male-to-female sexual contact and is a prevalent STD in today’s society. Chlamydia psittaci is the causative agent of gastrointestinal and respiratory infections in birds, and can be transmitted from bird feces and saliva to humans, causing them to develop pneumonia. Chlamydia trachomatis causes tubalitis, can make the fallopian tube produce scar tissue, form complete or partial blockage, cause infertility and ectopic pregnancy, and in most cases, chlamydia infection can have no obvious symptoms, make the fallopian tube and other pelvic tissues in the quiet situation of inflammatory lesions, so as to leave the danger of future conception of the “time bomb! The time bomb”. According to statistics, the United States every year due to chlamydia and caused by disease up to 4 million, 5 million cases, which is a very shocking figure. In addition, according to a research report, since the 1970s, the incidence of ectopic pregnancy has been on a steep upward trend, and in the 10 years until the mid-1980s, the incidence of ectopic pregnancy has jumped by more than three times. In the face of this rising risk of morbidity, the key to prevention lies in advocating sexual civilization and eliminating the spread of sexually transmitted diseases. Patients who have suffered from ectopic pregnancy, miscarriage, vaginitis, cervicitis, salpingitis, urethritis, prostatitis and infertility should be routinely tested for chlamydia and actively treated.