What is embryo freezing, and how it is successful?
On the day of embryo transfer, they can learn a couple of those embryos that have been selected for embryo transfer in addition to the extra embryos of good quality. These embryos can be cryopreserved by freezing them in liquid nitrogen. Through a series of carefully orchestrated move, finally embryo frozen at -196 ° C, suspended animation in a position in which they can live for many years left. Embryos that have been stored for more than 10 years have successfully generated pregnancies (most patients within 3 to 5 years to use their frozen embryos after they are produced). Place frozen embryo pregnancy rates associated with the patient’s age and depend on the quality of the embryo at the time of cryopreservation. Young patient’s top-quality embryos, pregnancy rates over 50% yield, while poor quality embryos survive the thawing process may not. In some clinics, over 75% of embryos survive the freeze-thaw cycles. “Slow cooling” and verification: Currently, two methods are used to freeze embryos. Verification more information can be found in question 72.
Many couples about their ethical obligations concerning their frozen embryos are concerned. In such cases, the couple embryo freezing to suspend, change or natural cycle IVF pursue their stimulus so as to avoid the problem of excess embryos can choose to choose. Additional embryos that are not used to initiate pregnancy embryonic stem cells could represent a source. The potential use of extra-embryonic stem cell research in the United States about government funding of recent political debate is at the heart. Obviously, patients consider carefully the impact of excess frozen embryos, as they embark on an IVF cycle. However, not all patients are embryo cryopreservation of extra embryos of high enough quality to be considered.