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How is CCS Incorporated into an IVF Cycle?

With comprehensive chromosomal screening (CCS), day 5 embryos, known as blastocysts are biopsied, and then transferred on day 6 of the cycle, explains Dr. Martin Freedman, a fertility doctor with RMA of Philadelphia. If day 6 embryos are biopsied, they are cryopreserved for a frozen embryo transfer.