<prompt> Risk of transplacental transmission of toxoplasma gondii is maximum when mother is infected:Prior to conceptionDuring first trimesterDuring second trimesterDuring third trimester  <response>: Risk of fetal infection in acute maternal toxoplasmosis increases with each trimester of pregnancy being 15, 25 and 60 in 1st, 2nd and 3rd trimesters respectively But severity of fetal infection is much greater in early pregnancy. 