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I am considering a donor embryo situation and have a couple of questions:
1. Are there any negative effects of shipping frozen embryos, or is it a better idea for me to go to the clinic where the embryos are and transfer there. (they are a few states away from us)
2. What contributes to the success of the thawing of the embryos? Do some clinics have better thawing techniques and that is why they have more survive the thaw? Or, is it all in the quality of the embryo and the thawing is uniform clinic to clinic.
As you can tell, I am trying to decide where to do this transfer. I can ship the embryos to my clinic (who happens to have higher FET success rates), or I can fly to the clinic where the embryos are, but that clinic has low FET success rates. But, I am not sure if the success rates mean alot in this situation.
Any insight is appreciated!!!
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The embryos can be safely shipped frozen in a special contained called a "dry shipper". You may have rent one from a local sperm bank, if the clinic that is to ship the embryos does not have one.
Protocols for freezing and thawing embryos have been standardized for many years, so freezing or thawing technique (per se) is not usually the reason for differences in FET rates from one clinic to another. Most clinics use the same type of commercially available, FDA-aproved kits for embryo cryopreservation and thawing. This has reduced lab to lab variability significantly. The main reason for the differences in FET success rates is that some clinics freeze most of the extra embryos (regardless of quality) and some clinics freeze only the embryos with the best developmental potential. Clinics that apply strict criteria in determining what embryos are "freezable" have the best success rates.
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