<prompt> Risk of rubella to fetus is maximum, if the mother is infected in:6-12 weeks20-24 weeks24-28 weeks32-36 weeks  <response>: Risk of rubella to fetus is maximum, if the mother is infected in 6-12 weeks. Timing of fetal infection determines the extent of teratogenic effect in fetus Ist 2 months Abnormalities in 65-85 cases, Multiple congenital defects cataracts, deafness and hea defects Spontaneous aboion 3rd month of fetal life: 30 to 35 chance of developing a single defect, Deafness ,CHD. During the 4th month 10 risk for a single congenital defect Beyond the 4th month No risk to fetus 