Carole - What are the biggest factors in IVF embryo fertilization rate? Sperm motility (and general health) I expect is part of it. How much is embryologist skill? If you have men with no known sperm issues, and they produce fertilization rates of say 75% and 100%, is that difference in large part the embryologist picking the right sperm and being skilled in ICSI and/or something else?
Thanks!