Gynaecology & Obstetrics Highest transmission of hepatitis B from mother to fetus occurs, if the mother is infected during: A 1st trimester B IInd trimester C IIIrd trimester D At the time of implantation 💡 Explanation Highest transmission of hepatitis B from mother to fetus occurs, if the mother is infected during: ✓ Correct Answer: C. IIIrd trimester