There is no pain during the transfer of embryos for IVF. The process of embryo transfer is to first place a speculum, expose the cervix, wipe the cervix with saline, clean the cervical mucus, and use a very thin catheter to deliver the embryo into the uterine cavity, where the endometrium is most suitable for implantation. If the placement is not smooth, it may take longer, but the pain can be tolerated because the doctor will be very gentle to prevent stimulating the uterus and affecting the effect of embryo transfer. Unlike egg retrieval which is painless, the whole process of IVF transfer is the most painless.