TY - RPRT TI - Maximizing pregnancy rates and limiting higher-order multiple conceptions by determining the optimal number of embryos to transfer based on quality. AU - Y Hu AU - W S Maxson AU - D I Hoffman AU - S J Ory AU - S Eager AU - J Dupre AU - C Lu PY - 1998 DO - 10.1016/s0015-0282(98)00024-7 UR - https://pubmed.ncbi.nlm.nih.gov/9548153/ ID - 9548153 ER -