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How Long Can Embryos Remain Frozen?
By Sam Thatcher, MD, Ph.D.
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 Q. I recently gave birth to my son, Brett. He was a product of IVF with ICSI. I have about 9 frozen embryos. My question is: What are my chances of conceiving another child/children, with the frozen embryos? IS there a life span if they are frozen? Can I go a natural cycle, or do I need to do Lupron again? The infertility was due to male infertility.
A. Not trying to pass the buck, but these are questions that should be easily and best answered by your IVF center. Success rates with frozen embryos are center specific. It is never quite as good as fresh, but the fact that it appears that it was primarily a sperm issue, should get you quite good chances of success - If your cycles are regular and especially if you ovulate on your own. Many centers do transfers with any form of stimulation or suppression. It's very easy, you monitor the cycle and stop by the first transfer. No one knows how long viability remains for frozen embryos. There have been successful pregnancies after 10 years. All agree the quicker out of the freezer the better, but this is largely for other reasons than the health of the embryo.
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