The human pregnancy-specific glycoproteins (PSGs) are a
group of molecules that are mainly produced by the placental
syncytiotrophoblasts during pregnancy. PSGs comprise a subgroup of
the carcinoembryonic antigen (CEA) family, which belongs to the
immunoglobulin superfamily. For additional general information
about the PSG gene family, see PSG1 (MIM 176390).[supplied by
OMIM].
