Cryopreservation is often done as oocyte cryopreservation ahead of fertilisation, or as embryo cryopreservation soon after fertilisation. The moment a doctor deems the uterine lining favorable for embryo transfer, the frozen embryos thaw. Then, a physician transfers them into the uterus using a catheter. The process is typically painless and https://www.ivf.com.mx/