Infertility can occur if there is an issue with either partner. The main factors causing infertility in women include ovulation disorders, fallopian tube factors, and abnormal endometrial receptivity. The primary factors causing infertility in men are abnormal spermatogenesis and ovulation disorders. Common etiological diagnoses generally include ovulation disorders, abnormal semen, fallopian tube abnormalities, unexplained infertility, endometriosis, and other immunological infertility. Additionally, cervical factors can also lead to infertility, such as cervical stenosis, which accounts for more than 5% of cervical factors.