The indications for the freeze-all IVF cycle could be medical or not medical. When we are talking about medical reasons, the most important and most common one is the risk of hyperstimulation syndrome. In that group of patients, the responses can be so high that we recommend freezing the embryos and doing the embryo transfer afterward to avoid the risk of having hyperstimulation syndrome and its consequences. Apart from that, sometimes we also may find problems in the endometrium, such as a thin endometrium while the stimulation is having done and apart from that, we can also find sometimes polyps inside the uterus, if that’s the case we recommend not freezing, not transfer the embryos and that moment, freezing all the embryos and doing maybe like a stereoscopy to make sure that the endometrium is in the best conditions possible. In the event that we find any problem in the uterus we can try to solve it at that time. However, on many occasions they decided to freeze the embryos for other reasons that are not medical. If we have a patient who is undergoing the preimplantation at genetic screening, we need to take the embryos and wait for the results, is that the case we freeze all the embryos until the results are ready.
