<prompt> Antibody transferred from mother to foetus -IgGIgMIgDIgA  <response>: IgG is the main serum immunoglobulin consisting of 80 of the total. equally distributed between intravascular and extravascular compaments. IgG is the only maternal immunoglobulin that is normally transpoed across the placenta and provide natural passive immunity in the newborns. Reference : Anathanarayan panikers 9th edition, pg no: 96,97 p 