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Embryos have been successfully frozen (cryopreserved) since the early 1980’s. Worldwide literature has confirmed that there is no increase in birth defects in children born from frozen embryos. The pregnancy rates with frozen embryos have been increasing steadily. For the past few years, we have been freezing embryos at the blastocyst stage (5 or 6 days after egg retrieval) using a technique called vitrification. For the past couple of years, the incidence of avoiding fresh … Continue reading