Constructs and methods for inducing immune tolerance during gestation, e.g. in utero, are provided. The constructs comprise a moiety that targets and binds to the neonatal Fc receptor (FcRn) and a moiety comprising an antigen of interest for which immune tolerance is desired. Administration of the constructs to a fetus during gestation results in immune tolerance, e.g. to antigens that otherwise elicit an unwanted immune response such as an autoimmune reaction.
