A prospective study involving 158 chronic HBV-infected pregnant women showed that during pregnancy or postpartum, spontaneous elevation of ALT in HBV-infected women was infrequent, mild, and self-limited; after birth, the group of women discontinuing antiviral medication was more likely to have ALT flare (AF, defined as ≥100 U/L), and the AF was also self-limiting and mild (31). The gene discussed is GPT; the disease is atrial fibrillation.