<prompt> All of the following statements are true about congenital rubella exceptIt is diagnosed when the infant has IgM antibodies at bihIt is diagnosed when Ig G antibodies persist for more than 6 monthsM.C. congenital defects are deafness, congenital hea disease and cataractInfection after 16 weeks of gestation result in major congenital defects  <response>: The risk of congenital defects has been estimated at 90 for maternal infection before 11 wks of gestation,33 at 11-12 wks ,11 at 13-14 wks, and 24 at 15-16 wks Defects occuring after 16 wks of gestation are uncommon ,even if fetal infection occurs. The fetus is completely spared if infection occurs beyond 16 weeks. Reference: Nelson textbook of pediatrics 19th edition Page 1075 