During IVF treatment, the main procedures are transvaginal ultrasound egg retrieval and embryo transfer, the latter is relatively safe, while the former is not a major surgery, but there may still be risks of bleeding, injury to other surrounding organs, infection, etc. It is estimated that most patients are able to understand the existence of these risks, so there is no need to repeat them, here, I just want to explain egg retrieval for IVF patients Here, I just want to explain to IVF patients a special case of puncture through the bladder that is common during the procedure! I will first briefly explain the process of ‘egg retrieval’. The patient lies down in the usual ultrasound position, the doctor disinfects the towel, holds the ultrasound probe in the left hand and the puncture needle in the right hand, and then, after finding the best position for the puncture to enter the ovary under ultrasound guidance, the puncture needle enters the position accurately. Before the needle enters the ovary to aspirate the follicle, it needs to pass through the vaginal wall and a little bit of soft tissue in the pelvis. During this process, the doctor will avoid all the small and large blood vessels that can be seen through ultrasound guidance so that the patient will not bleed more than once. In some patients, however, the ovaries are not as ideally positioned as the doctor would like them to be. One of the more common exceptions is when the ovaries are covered by the bladder, which is prone to this condition because the bladder and uterine ovaries are located next to each other. Some of these patients have a bladder that partially covers the ovaries, so the doctor will move the ultrasound probe around to find a new puncture location that avoids the bladder, but in other cases, the bladder cannot be avoided, which means that the puncture needle must pass through the bladder to reach the ovaries to retrieve the eggs. In theory, there is a risk of bladder bleeding, but in practice, the incidence of bladder bleeding is very low. The bladder is mainly composed of mucosa, smooth muscle and blood vessels, and the needle is very thin, so the probability of puncturing a blood vessel is not too high. Therefore, we usually inform the patient of this situation during the procedure and we prefer to continue with the egg retrieval if the patient is well informed. For patients whose bladder has been punctured during egg retrieval, you do not need to be too nervous psychologically, you need to give your informed consent during the surgery and continue to cooperate with the surgeon to complete the surgery. If you encounter postoperative hematuria, then timely bladder irrigation is effective for most patients. iv, if the above methods cannot stop the bleeding, you can also stop the bleeding through cystoscopy, which is a minimally invasive procedure. The above mentioned content is mainly for IVF patients to have a more comprehensive understanding of IVF technology and not to be too nervous before the egg retrieval procedure, the source of nervousness is bewilderment, if everything is clear to you, you will be able to face the procedure with a more relaxed mood, cheer up!