Immunoprophylaxis against HBV fails and MTCT occurs in 10-15% of infants.

Telbivudine (LDT) has been classified Sotrastaurin supplier as pregnancy category B (FDA) and has been recommended by EASL and APASL guidelines for preventing HBV infection during pregnancy. Methods: We performed a systemic review on all pregnancy cases with LDT exposure from 3 databases: Literatures, Periodic Safety Update Report (PSUR) (a Novartis data collecting system with adverse events collecting purpose) and antiretroviral pregnancy registry (APR). Reports were analyzed and overlapping cases were excluded through clarification with the responsible authors. Results: In total, 1695 LDT-treated pregnancies were reported from the 3 databases with the outcome of 1426 living learn more babies. Of 26 publications identified, 16/26 publications were non-overlapping with 1260 pregnancy

cases. 137/1260 cases were exposed during the first trimester. Of the 1260 pregnancy cases, 1 196 infants were born (2 with and 1 194 without congenital anomaly). The total prevalence rate of live birth defects in LDT-treated pregnancies was 2.5/1000 compared to 3.4/1000 in the non-antiviral control. The perinatal transmission rates reported with LDT was 4.2/1000 vs. 103/1000 in non-antiviral control (P<0.0001). The prevalence rate of spontaneous abortion in LDT-treated pregnancies was 4.73/1000 vs. 16/1000 in the overall population. From the PSUR,

405 pregnancy cases with exposure to LDT have been reported and out of 405 pregnancy cases, 207 infants were reported to be born (7 with and 200 without congenital anomaly). Of 30 pregnancy cases reported in APR, 1 6 cases were exposed in first trimester. Birth outcomes were reported in 23/30 cases and there were no birth defects reported 上海皓元医药股份有限公司 with LDT exposure. Conclusions: Telbivudine treatment during pregnancy had a favorable safety outcome for mothers and infants with no increase in live birth defects or spontaneous abortion. Telbivudine could effectively prevent MTCT of HBV infection without increasing risks of birth defects in babies. Disclosures: Charles Koehne – Employment: Novartis Pharmaceuticals Yuhong Dong – Employment: novartis Aldo Trylesinski – Employment: Novartis The following people have nothing to disclose: Guo Rong Han, Serguei Titaevski Background: The decline in quantitative serum hepatitis B surface antigen (qHBsAg) level and its predictors in chronic hepatitis B (CHB) patients undergoing long-term entecavir (ETV) therapy remain unclear.