There are many items in the transvaginal ultrasound examination. For the infertility doctor to look at the size, shape and position of the uterus, the size of the ovaries, the number of sinus follicles and the echogenicity. In addition, they will look for the presence of fluid in the fallopian tubes, the anatomical structure of the uterus, ovaries and fallopian tubes in the pelvis, and observe the pelvic fluid to determine whether there are pelvic adhesions and pelvic inflammatory diseases. For gynecologists, they mainly look for ectopic pregnancy, whether it is in the fallopian tube or on the ovaries or in the pelvis, and then endometrial polyps, endometriosis, fibroids, etc. For obstetricians, they look for embryos in the third trimester of pregnancy. Transvaginal ultrasound is more acceptable because it does not require holding urine and the clarity of the examination is higher.