FMR1 and fragile X syndrome: Efforts to reduce the possibility of somatic mosaicism, which could complicate subsequent studies, should be made to ensure efficient utilization of the NHP resource Additionally, establishing pregnancies with embryos of a known FMR1 genotype provides a basis for including measures of gestational morphometrics and establishment of FXS-related pregnancy morphometrics that may contribute further to the identification of physical and possibly molecular biomarkers as this model system develops.