Embryo Frozen: Store extra embryos

Due to the widely use of ovulate stimulation injections and the mature of IVF technology, we can get many embryos. Avoid transferring too much embryos cause multiple births, we can freeze embryos for use in the future. When patient want to get pregnant, Doctor will arrange a suitable cycle for transfer frozen embryos. In this cycle, patient doesn’t inject ovulate stimulation injections and undergo the oocyte retrieval surgery, only need to control the ovulation day and arrange the transfer day. Due to the embryo frozen technology get better and the fine uterine environment, the successful rate is higher than the past.

Cryopreservation of vitrification

Vitrification is the solidification process that can’t form the crystal. Using the high concentration of the cryoprotectant to replace the water in the cell and put the embryo on the cryotop. The embryo store at the -196°C of liquid nitrogen, the substance in the cell and the little cryoprotectant on the cell surface instantly form a solid glassy substance with high viscosity. The remaining water in the cell is fixed before form the ice crystals, so the damage in the cell can be reduced. The development of the cryopreservation of vitrification in recent years make the survival rate of the frozen embryos better, thus improving the pregnancy rate of the frozen embryos.