Comparison of amino acid metabolism in frozen-thawed and fresh early-stage hu…

Abstract: Aims: To compare the amino acid differences of changes of frozen-thawed early-stage human embryos andfresh cultured early-stage human embryos. Material and Methods: Discarded embryos and their in vitro culture medium of patients who underwent in vitro fertilization-embryo transfer (IVF-ET) at the Research Center for Reproductive Medicine, the Sixth Affiliated Hospital of Sun Yat-sen…