Highest rate of transmission of toxoplasmosis during pregnancy is seen in:
1st trimester
Ilnd trimester
IlIrd trimester
Puerperium
“The incidence and severity of congenital infection depend on fetal age at the time of maternal infection.The risks for fetal infection increases with duration of pregnancy from 6 % at 13 weeks to 72 % at 36 weeks. Conversely the severity of fetal infection is much greater in early pregnancy and fetuses are much more likely to develop clinical findings of infection."
Williams Obs. 24/e, p 1255