<prompt> Toxoplasmosis in the fetus can be best confirmed by -IgM Abs against toxoplasmosis in the motherIgM Abs against toxoplasmosis in the fetusIgG Abs against toxoplasmosis in the motherIgG Abs against toxoplasmosis in the fetus  <response>: Diagnosis of Congenital toxoplasmosis: Presence of IgM Abs in fetus indicates congenital infection. The presence of circulating IgA ors the diagnosis of an acute infection as IgA-ELISA is more sensitive than IgM-ELISA for detecting congenital infection in the fetus. Toxoplasma Ag in amniotic fluid, PCR to detect Toxoplasma genes. 