SLC7A7 and fetal growth restriction: In the present study, we demonstrated that the Slc7a7Lbu/Lbu embryos (C57BL/6×129/SvEv F2 background) exhibited 25% lower body weights than those of WT embryos at E17.5, which is consistent with the IUGR reported in three Slc7a7-deficient embryo models (Stroup et al., 2020; Sperandeo et al., 2007).