In the process of IVF, after going through the full evaluation before IVF, ovulation stimulation and egg retrieval many patients and couples can’t wait to have the embryo transfer, however, sometimes the doctor will tell: your situation is not suitable for fresh embryo transfer, you have to wait for a while, so which patients are not suitable for fresh embryo transfer? Let’s find out together. 1.Patients with high risk of OHSS If in the process of ovulation promotion, ultrasound found that the patient’s ovary is large in size, with many follicles, and the estrogen level is too high when taking the night shot, then the risk of Ovarian Hyperstimulation Syndrome (OHSS) is very likely to occur. The study surfaces that for patients with a tendency to severe OHSS in IVF-ET cycles, abandoning the transfer of fresh embryos and performing frozen embryo transfer after ovarian function is restored can significantly reduce the occurrence of OHSS. 2.Patients with poor endometrial status If the patient has endometrial problems such as endometrial polyps, endometrial overthickness or overthinness, poor endometrial blood flow, submucosal fibroids, etc., it will affect the embryo’s implantation on the uterus. Therefore, it is more recommended for patients to correct the endometrial problems according to the specific situation before proceeding with frozen embryo transfer. 3.Patients with asynchronous development of endometrium and embryo Synchronized development of endometrium and embryo can be better combined together to form a better embryo implantation rate. If the patient’s embryo development is delayed, or the progesterone rises in advance, resulting in the endometrium and embryo development is not synchronized, it is also not recommended to perform fresh embryo transfer. In addition, if the patient has fluid in the uterine cavity, hydrosalpinx in the fallopian tube, large fibroid tumors in the uterus, or other systemic diseases that need to be treated first, it is also not suitable for fresh embryo transfer. All things considered, each patient’s own conditions are different, the required program is also different, please trust the doctor for your individualized plan, early dream of motherhood.