{Reference Type}: Journal Article
{Title}: The effect of an extended culture period on birth weight among singletons born after single or double vitrified embryo transfer.
{Author}: Wang N;Lin K;Zhao X;Zhang P;
{Journal}: Front Endocrinol (Lausanne)
{Volume}: 15
{Issue}: 0
{Year}: 2024
{Factor}: 6.055
{DOI}: 10.3389/fendo.2024.1184966
{Abstract}: <B>UNASSIGNED: </B>To evaluate the effect of an extended culture period on birth weight among singletons born after vitrified-warmed embryo transfer.<BR><B>UNASSIGNED: </B>A retrospective cohort study was performed among 12400 women who gave birth to 1015, 1027, 687, and 9671 singletons after single blastocyst transfer, single cleavage-stage embryo transfer, double blastocyst transfer, and double cleavage-stage embryo transfer, respectively.<BR><B>UNASSIGNED: </B>The unadjusted birth weight of singletons born after vitrified blastocyst transfer were heavier than those born after cleavage-stage transfer (β=30.28, SE=13.17, P=0.022), as were the adjusted birth weights (β=0.09, SE=0.03, P=0.007). In addition, there was a 37% increased odd of having an infant with high birth weight after vitrified blastocyst transfer compared with vitrified cleavage stage transfer (OR=1.37, 95% CI:1.07-1.77).<BR><B>UNASSIGNED: </B>The unadjusted and adjusted birth weight and odds of having an infant with high birth weight significantly increased after blastocyst transfer compared with cleavage-stage embryo transfer in vitrified-warmed cycles.