Fluid in the fallopian tubes is a common problem in patients with infertility, often due to a variety of causes such as inflammation and surgical injury. Some hydrocele is temporary and may change with the menstrual cycle; others are persistent. If the fluid is connected to the uterine cavity, it may drain into the uterine cavity when estrogen levels are high before ovulation and the patient feels a paroxysmal vaginal drainage that may disappear after ovulation. In this case, it is necessary to carefully observe the changes in vaginal flow and make detailed records to inform the doctor to decide whether to transfer the embryo, whether to treat the fluid in the fallopian tube, etc. If there is no vaginal discharge throughout the menstrual cycle and the discharge is normal, it is not necessary to treat it. However, if the embryo transfer fails repeatedly and other causes are excluded, it is necessary to consult an experienced laparoscopic surgeon and a fertility specialist to decide whether the hydrocele needs to be treated and how to treat it, and it is important not to ligate or remove the fallopian tubes at the sight of the water as this may lead to the ovarian function being affected.