Frozen Embryo Transfer

Frozen Embryo Transfer

Embryos produced in an in vitro fertilization cycle may be cryopreserved for future use. These embryos may be transferred in a frozen embryo transfer (FET) cycle. Patients wishing to use their cryopreserved embryos should contact the clinic to activate their name on the frozen embryo transfer wait-list and make a follow up appointment with their clinic physician for review prior to proceeding with treatment.

There has been some recent evidence supporting the use of assisted hatching to improve success rates when cryopreserved reproductive tissue is used due to the associated changes in the zona pellucida. As the freezing or vitrification process hardens the shell (zona) it is recommended to proceed with assisted hatching to help facilitate hatching and implantation of the embryo. Consult with your physician with questions regarding the use of laser assisted hatching during your FET cycle.

For patients requesting FET following pregnancy, a minimum of two normal menstrual cycles after completion of breastfeeding is recommended.

For patients requesting FET following unsuccessful fresh embryo transfer, a minimum of two normal cycles after the unsuccessful cycle is required.

It is important to have a recent ultrasound, and hysterosalpingogram (HSG) or sonohysterogram (SHG) in order to ensure a normal uterine cavity to maximize pregnancy rates.

Success Rates