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First of all, IVF doesn't work every time. At best, it works half the time. Accordingly, you need to lower your expectations to be in agreement with the biological reality. The assisted reproductive technologies can not make the reproductive process 100% successful. You could spend a great deal of unproductive time wondering why the IVF cycle didn't work and, in the end, you will never know because the embryos were transferred on Day 3 when the developmental potential of the embryos was unknown.
The percentage of embryos that are developmentally compentent enough to reach the blastocyst stage of development (the stage at which the embryo initiates the implantation process) is significantly reduced when ICSI is performed for severe sperm problems (i.e. a sperm count of < 1M/ml). My advise to you is to repeat IVF/ICSI and extend the culture of the embryos to the blastocyst stage. Then, transfer only 2-3 blastocyst stage embryos. Transferring 6 embryos on Day 3 is dangerous. Culturing the embryos to the blastocyst stage will also reduce damage to any cryopreserved embryos, as freezing at the blastocyst stage has a higher survival rate than Day 3 cryopreservation.
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