The fertilized oocytes are further cultured up to day 2 or 3, and then embryo transfer is performed. Assisted hatching is performed to avoid reduced implantation due to a hardened zona pellucida. When a large number of embryos have been formed, alternative approaches could be either an extended culture to the blastocyst stage or a double transfer (62). A double transfer is performed on day 2 or 3 and a blastocyst transfer on day 5 or 6. The embryo transfer technique is the same as that employed for conventional IVF.
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A Beginner's Guide to Healthy Pregnancy. If you suspect, or know, that you are pregnant, we ho pe you have already visited your doctor. Presuming that you have confirmed your suspicions and that this is your first child, or that you wish to take better care of yourself d uring pregnancy than you did during your other pregnancies; you have come to the right place.