Although there are different types of egg retrieval needles, the length of an egg retrieval needle is usually about 35 centimeters. Egg retrieval is the process of removing a mature follicle from the ovary using an egg retrieval needle under the guidance of a negative ultrasound. The type and thickness of the needle varies, but the length of the needle is usually around 35 centimeters, and the number of follicles and the ease of ovarian puncture should be taken into consideration when choosing the needle. During the egg retrieval process, anesthesia is usually administered, but pain can still be felt. Once the egg retrieval needle removes the follicle from the ovary, it is combined with sperm and the combined fertilized egg is then placed in a test tube for culture. After the egg retrieval surgery, the woman’s body will be weaker and may have enlarged ovaries or even fluid in the abdomen, so she should pay attention to bed rest and recuperate, and should not lift heavy objects or engage in strenuous activities. If there is any pain and discomfort in the lower abdomen, fever, or vaginal bleeding after the egg retrieval surgery, she should go to the hospital in time to see a doctor, and take the appropriate way to intervene under the guidance of the doctor.