Ascites does not affect embryo implantation, but it can be aggravated by embryo implantation. Ascites does not affect embryo implantation during IVF. Some women can develop mild ascites after egg retrieval, which is mainly caused by changes in ovarian vascular osmotic pressure after egg retrieval and leakage of follicular fluid during egg retrieval. If mild ascites is present, subsequent embryo transfer can still be arranged. If severe ascites is present, embryo transfer should be withheld. This is mainly due to the fact that the mother’s medications for treating ascites are limited after the transfer, and that if the embryos are successfully implanted, the body’s secretion of human chorionic gonadotropin and oestrogen will further stimulate an increase in ascites, which can be life-threatening for the mother.