During IVF or in-vitro fertilisation, sperm and eggs are mixed together in a dish to produce fertilised embryos, one or two of which are placed in the uterus where the hope is they will trigger a successful pregnancy. Previously, embryologists would pick out and use only what they judged to be the most promising looking embryos. But now new research from the reproductive genetics company, Igenomix, has found that a large proportion of embryos that were previously being overlooked can in fact lead to successful pregnancies. Katie King spoke to lead author Antonio Capalbo about these findings... Like this podcast? Please help us by supporting the Naked Scientists