Baseline Hepatitis B Virus Titer Predicts Initial Postpartum Hepatic Flare: A Multicenter Prospective Study

Area of Science:

• Hepatology
• Immunology
• Virology

Background:

• Pregnancy and puerperium involve significant immune system changes.
• Liver inflammation and hepatitis B viremia dynamics during pregnancy are not fully understood.

Purpose of the Study:

• To characterize natural changes in liver inflammation.
• To assess the association between hepatitis B viremia and liver inflammation during pregnancy and postpartum.

Main Methods:

• Prospective follow-up of 1097 chronic hepatitis B (CHB) mothers for 52 weeks postpartum.
• Assessment of virological and biochemical parameters, including viral load and alanine aminotransferase levels.
• Analysis of outcomes in groups receiving telbivudine, tenofovir, or no antiviral therapy.

Main Results:

• Hepatic flare occurred in 11.94% in the first trimester, decreasing to 2.1% at delivery, but rising to 19.78% postpartum.
• High baseline hepatitis B virus (HBV) titer (>6 log10 IU/mL) was strongly associated with postpartum hepatic flare (OR 1.012-3.049, P=0.045).
• Predictive rates for hepatic flare increased with baseline viral load: 16.67% (6 log10), 28.30% (7 log10), and 30.60% (8 log10).

Conclusions:

• CHB mothers with high viremia require close monitoring throughout pregnancy.
• Extended antiviral therapy is recommended for mothers with baseline viremia >7 log10 IU/mL to prevent postpartum hepatic flare.