Hepatitis B surface antigen positivity during pregnancy and risk of gestational diabetes mellitus: A systematic review and meta-analysis

Hepatitis B virus infection during pregnancy and the risk of postpartum hemorrhage: a protocol for systematic review and meta-analysis

Background

Hepatitis B virus (HBV) infection is a significant public health issue worldwide, with a hepatitis B surface antigen (HBsAg) seroprevalence of 3.5%. Maternal HBV infection during pregnancy, a common comorbidity, is associated with an increase in the risk of adverse obstetric and perinatal outcomes. However, the relationship between maternal HBV infection and postpartum hemorrhage (PPH), a leading contributor to maternal morbidity and mortality, is currently uncertain. The aim of this study is to comprehensively clarify the potential impact of maternal HBV on PPH risk.

Methods and Analysis

The authors initially searched five English databases and three Chinese databases from their inception to 26th June 2023. Two reviewers will independently conduct study selection, data extraction, and quality assessment. Cohort and case-control studies investigating the effect of maternal HBV infection on PPH will be included, with study quality assessed using the Newcastle-Ottawa Scale (NOS). Meta-analyses will be performed using a fixed-effects model for I 2≤50% or a random-effects model otherwise. Several categories of subgroup analyses (e.g. sample size more than 1000 vs. less than 1000) and sensitivity analyses (e.g. omit NOS scores less than 7) will be conducted, and publication bias will be assessed through funnel plots, Begg's and Egger's tests using STATA 18.0.

Ethics and Dissemination

This systematic review and meta-analysis do not require ethics approval and the results will be published in peer-reviewed journals. The findings of this systematic review will provide evidence on the impact of maternal HBV infection on PPH, which will contribute to better prevention and management of PPH in clinical practice and a better understanding of the disease burden of HBV infection.

PROSPERO registration number

CRD42023442626.

Unravelling the mechanisms by which chronic hepatitis B infection is associated with an increased risk of gestational diabetes

An independent association between chronic hepatitis B virus (HBV) and the development of gestational diabetes (GDM) has been reported in the literature. Ethnic background and regional influences have been demonstrated to play a role in the reporting of incidence rates of GDM among women with chronic HBV. The mechanisms behind this association are poorly understood, but evidence suggests an inflammatory basis. Viral factors such as chronic HBV replication, quantifiable by HBV viral load, have been proposed to contribute to the increasing risk of insulin resistance in pregnancy. More research is needed to better characterise the association and determine if any interventions early in pregnancy for women infected with chronic HBV would mitigate the development of GDM.

Prevalence of hepatitis B virus infection among pregnant women in the mountainous regions of southern China: A retrospective single-center study

BACKGROUND

Hepatitis B virus (HBV) infection remains a major public health issue worldwide. Moreover, its prevalence varies significantly in different geographic areas of China. The current study aimed to assess the prevalence of HBV infection among Hakka pregnant women in Meizhou, a remote mountainous region in southern China.

METHODS

This research was performed between January 2015 and December 2020. In total, 16,727 pregnant women receiving antenatal care at Meizhou People's Hospital were included in the analysis. All pregnant women were screened for serum HBV markers.

RESULTS

The prevalence rates of hepatitis B surface antigen (HBsAg) and hepatitis B surface antibody positivity among the participants were 11.74% (n = 1964) and 48.00% (n = 8029), respectively. The overall prevalence rates of susceptibility to infection, HBV immunity, previous/occult infection, inactive HBsAg carrier, and active infection were 36.16%, 33.61%, 16.94%, 8.11%, and 2.30%, respectively. According to age distribution, the prevalence rate of HBsAg positivity elevated concomitantly with increasing age (p < 0.001). From 2015 to 2020, the prevalence rate of HBsAg positivity decreased from 14.50% to 8.19% and that of hepatitis B pre-core antigen positivity from 4.42% to 2.31%. In addition, pregnant women with HBsAg-positive status were more likely to present with gestational diabetes, thrombocytopenia, and anemia than those with HBsAg-negative status.

CONCLUSION

The HBV infection rate remains high among pregnant women in the indigenous Hakka population in southern China. To prevent vertical transmission, cautious surveillance of maternal HBV infection status should be considered in Hakka pregnant women in Meizhou.

Influence of hepatitis B virus on the prevalence of diabetes complications in patients with type 2 diabetes

AIMS/INTRODUCTION

Diabetes and hepatitis B are both global problems. The influence of diabetes on complications and prognosis of hepatitis B has been widely studied. However, the association between hepatitis B virus (HBV) infection and the prevalence of diabetes-related complications is less documented and is uncertain.

MATERIALS AND METHODS

This was a retrospective study. We collected information from a large clinical database. A total of 1,090 Chinese inpatients with type 2 diabetes were included.

RESULTS

The participants were divided into two groups, including 135 patients with HBV infection and 955 patients without HBV infection. Patients with HBV infection were younger and had worse control of blood glucose than those without HBV infection. No significant difference was found in the prevalence of diabetic retinopathy, neuropathy, nephropathy, diabetic ketosis or diabetic ketoacidosis between the patients with HBV infection and the patients without HBV infection. The prevalence of macrovascular complications was 54.1% and 64.4% in diabetes patients complicated with HBV infection and without HBV infection, respectively. The P-value was <0.05. However, through the logistic regression analysis, we found HBV infection was not an independent risk factor for macrovascular complications of diabetes.

CONCLUSION

There was no significant correlation between the prevalence of macrovascular complications, microvascular complications of diabetes, diabetic ketosis or diabetic ketoacidosis and HBV infection status.

Relationship between different hepatitis B virus infection status and gestational diabetes mellitus prevalence among pregnant women with chronic HBV infection: A retrospective study

To investigate the relationships between different hepatitis B virus (HBV) infection status and gestational diabetes mellitus (GDM) and analyse the potential risk factors, we conducted an observational retrospective study in HBV-infected pregnant women to compare the differences of GDM prevalence and clinical outcomes between groups divided by HBV infection status. Spearman's correlation coefficient was used to evaluate the correlations among hepatitis B e antigen (HBeAg), HBV DNA and liver function. Logistic regression model was used to analyse the risk factors. In all, 1390 HBsAg-positive pregnant women were enrolled. HBeAg titre and HBV DNA, ALT and AST were correlated (r = 0.743, p < 0.001; r = 0.813, p < 0.001). Overall GDM prevalence was 21%. GDM prevalence of HBV-infected women with abnormal liver function was higher than those with normal liver function (26.8% vs. 20%, p = 0.027). Age over 35 years and abnormal liver function over 5 times ULN and 1-2 times ULN were independent risk factors for GDM prevalence with odds ratio (OR) of 1.858 (95% CI 1.227-2.815), 1.589 (95% CI 1.023-2.468) and 2.203 (95% CI 1.029-4.718), respectively. GDM prevalence in HBV-infected pregnancies with abnormal liver function was higher than those with normal liver function. Age over 35 years and abnormal liver function were independent risk factors for GDM in HBV-infected women.

Hepatitis C is associated with more adverse pregnancy outcomes than hepatitis B: A 7-year national inpatient sample study

Prior international studies have shown mixed results regarding the association of hepatitis B and hepatitis C with adverse pregnancy outcomes. We performed an updated evaluation of the prevalence of associated adverse pregnancy outcomes and evaluated trends over time of diagnosis of chronic hepatitis B (HBV) and chronic hepatitis C (HCV) in pregnant women in a national database. All pregnant women with HBV and HCV were identified from the National Inpatient Sample database 2012 to 2018. Multivariate logistic regression analyses were performed to compare pregnancy‐related complications, including rates of preeclampsia/eclampsia, gestational diabetes, intrauterine growth restriction, antepartum/intrapartum hemorrhage, preterm labor, and Cesarean section. We evaluated all‐cause in‐hospital mortality, length of stay, and total cost of hospitalizations. A total of 28.7 million pregnancy‐related hospitalizations that met our eligibility criteria were identified, including 51,200 with HBV and 131,695 with HCV. In comparison with the uninfected controls, the HBV group was significantly more likely to develop gestational diabetes (12.94% vs. 6.94%, p < 0.001). The HCV group was more likely to have preterm labor (9.63% vs. 6.27%, p < 0.001), intrauterine growth restriction (6.04% vs. 2.89%, p < 0.001), longer length of stay (3.4 days vs. 2.7 days, p < 0.001), and higher hospitalization cost (15,052 dollars vs. 14,258 dollars, p < 0.001). These findings should inform counseling of women who are found to have HBV or HCV during pregnancy regarding the risk of adverse pregnancy outcomes and support the need for an interdisciplinary approach to optimize maternal and neonatal outcomes.

The impact of biparental hepatitis B virus infection on pregnancy outcomes in patients undergoing assisted reproductive technology treatment: a systematic review and meta-analysis

PURPOSE

To evaluate the association between biparental hepatitis B virus (HBV) infection (hepatitis B surface antigen [HBsAg] seropositivity) and pregnancy outcomes in patients undergoing assisted reproductive technology (ART) treatment, including clinical pregnancy rate (CPR) and live birth rate (LBR).

METHODS

We searched various literature databases from the earliest date available until May 20, 2021, including PubMed, Embase, Medline, Web of Science, Scopus, CNKI, and Wangfang. Four patterns of biparental HBV infection for pregnancy outcomes following ART were synthesized separately by using random-effects model. We also performed subgroup analyses (matched or unmatched) and two forms of sensitivity analysis.

RESULTS

A total of 25 retrospective cohort studies, involving more than 19,269 couples, were included. Maternal and paternal HBV co-infection (crude relative risk [cRR]: 0.58, 95% confidence interval: 0.28-1.23), either maternal or paternal infection (cRR: 1.05, 0.88-1.24), maternal HBV infection alone (cRR: 0.96, 0.79-1.16), or paternal HBV infection alone (cRR: 1.02, 0.91-1.13) were not associated with significant reductions in CPR at per woman level. These patterns of infection were also not significantly associated with decreased LBR at per woman level. However, paternal HBV infection alone reduced CPR (adjusted odds ratio: 0.54, 0.33-0.86) and LBR (cRR: 0.52, 0.28-0.99) at per cycle level. Subgroup analyses and sensitivity analyses were mostly consistent with the primary results.

CONCLUSIONS

Paternal HBV infection alone probably decrease CPR after ART at per cycle level. However, maternal HBV infection was not associated with reductions in CPR and LBR in women undergoing ART at per woman level.

Asian Pacific association for the study of liver (APASL) guidelines: hepatitis B virus in pregnancy

Hepatitis B virus (HBV) infection still remains a major public health issue in the Asia-Pacific region. Most of the burden of HBV-related disease results from infections acquired in infancy through perinatal or early childhood exposure to HBV in Asia-Pacific. Hepatitis B during pregnancy presents unique management issues for both the mother and fetus. These APASL guidelines provide a comprehensive review and recommendations based on available evidence in the literature, for the management of females with HBV infection through every stage of pregnancy and postpartum. These also address the concerns, management challenges, and required follow-up of children born to hepatitis B-positive mothers.

Viral Infections During Pregnancy: The Big Challenge Threatening Maternal and Fetal Health

Viral infections during pregnancy are associated with adverse pregnancy outcomes, including maternal and fetal mortality, pregnancy loss, premature labor, and congenital anomalies. Mammalian gestation encounters an immunological paradox wherein the placenta balances the tolerance of an allogeneic fetus with protection against pathogens. Viruses cannot easily transmit from mother to fetus due to physical and immunological barriers at the maternal-fetal interface posing a restricted threat to the fetus and newborns. Despite this, the unknown strategies utilized by certain viruses could weaken the placental barrier to trigger severe maternal and fetal health issues especially through vertical transmission, which was not fully understood until now. In this review, we summarize diverse aspects of the major viral infections relevant to pregnancy, including the characteristics of pathogenesis, related maternal-fetal complications, and the underlying molecular and cellular mechanisms of vertical transmission. We highlight the fundamental signatures of complex placental defense mechanisms, which will prepare us to fight the next emerging and re-emerging infectious disease in the pregnancy population.

Obstetric implications of maternal chronic hepatitis B virus infection

Antenatal screening for hepatitis B surface antigen seropositivity is widely adopted to identify pregnant women with chronic hepatitis B virus (HBV) infection in order to target their newborn infants for combined passive-active neonatal immunization to prevent the maternal-to-child transmission of HBV. It is less certain whether the presence of chronic HBV infection in these largely asymptomatic women could impact their pregnancy outcome. There is now gathering information in the literature, though sometimes conflicting, on the obstetric implications of chronic HBV infection. The conflicting data is most probably related to confounding factors such as the immunological phase of chronic HBV infection, viral genotype and activity, presence of hepatic inflammation and other co-existing liver disorders such as non-alcoholic fatty liver disease, and coinfection with other virus such as hepatitis C virus and micro-organisms, which are usually not examined, but which could have made significant influence on the occurrence of many of the pregnancy complications and adverse fetal and neonatal outcome. For pregnancy complications, the evidence suggests association with increased gestational diabetes mellitus, preterm birth, intrahepatic cholestasis of pregnancy, caesarean delivery, and postpartum haemorrhage, probably increased placental abruption and prelabour rupture of the membranes, and no effect or a reduction in the hypertensive disorders of pregnancy, especially preeclampsia. For perinatal outcome, there may be increased miscarriage and fetal malformations, and increase in both low birthweight and large-for-gestational age/macrosomic infants, as well as increased intrauterine fetal demise/stillbirth and fetal distress. However, most studies have not elaborated on the mechanisms or explanations of many of the adverse outcomes. Taken together, maternal chronic HBV infection increases the risk of adverse obstetric outcome overall, but further prospective studies are warranted to elucidate the reasons and mechanisms of, and with a view to mitigate, these adverse obstetric outcomes.

Association between maternal hepatitis B virus carrier and gestational diabetes mellitus: a retrospective cohort analysis

INTRODUCTION

Given that many pregnant women have chronic hepatitis B virus (HBV) infection and that gestational diabetes mellitus (GDM) is linked to poor maternal and neonatal outcomes, we looked into the relationship between the hepatitis B surface antigen (HBsAg) and GDM to see if a high HBV DNA load is linked to a higher risk of GDM in chronic maternal HBsAg carriers.

MATERIALS AND METHODS

Our study included 39,539 pregnant women who gave birth at the Third Affiliated Hospital of Guangzhou Medical University in Guangzhou, China, between January 1, 2009, and December 31, 2019. The patients were divided into two groups: HBsAg negative (36,500) and positive (3039). The viral load levels of 1250 HBsAg-positive women who had tested their HBV DNA load during pregnancy were separated into three groups. We utilized univariate and multivariable logistical regression analysis to determine the relationship between maternal chronic HBsAg carrier and GDM.

RESULTS

Being HBsAg positive was discovered to be an independent risk factor for GDM.Pre-pregnancy Obesity and advanced age were linked to an increased incidence of GDM. Those with a high HBV DNA load (> 10⁶ IU/mL) had a higher risk of GDM than HBsAg-positive women with a low viral load (< 10³ IU/mL). Pre-eclampsia and intrahepatic cholestasis of pregnancy (ICP) appeared to be more common in HBsAg-positive women than in uninfected women.

CONCLUSIONS

Being HBsAg positive, advanced age, and pre-pregnancy obesity were all revealed to be independent risk factors for GDM in our study. In HBsAg carrier, pregnant women, a high HBV DNA burden was linked to a greater risk of GDM. Furthermore, being an HBsAg carrier during pregnancy raised the risk of ICP and pre-eclampsia.

Maternal chronic hepatitis B virus infection and the risk of preterm birth: A retrospective cohort analysis in Chinese women

The association between different clinical states of chronic HBV infection and preterm birth (PTB) is still controversial. A retrospective cohort study among 57,386 pregnant women was conducted to examine the impact of chronic HBsAg positive, both HBsAg and HBeAg positive, and chronic active hepatitis on pregnancy complications related to the overall PTB and its subtypes (spontaneous and iatrogenic). A total of 54,245 pregnancies were included in the final study cohort, among which 2,151(4.0%) pregnant women were HBsAg positive. The PTB rate was 6.0% (129/2151) for HBV-infected women while 4.5% (2319/52094) for those not. Compared with women not infected with HBV, multivariable-adjusted analyses showed HBV-infected women had a 33% higher risk of overall PTB (aRR 1.33 95%CI, 1.11-1.60), a 27% higher risk of spontaneous PTB (aRR 1.27, 95% CI, 1.02-1.57) and a 50% higher risk of iatrogenic PTB (aRR 1.50, 95%CI, 1.07-2.11). The PTB rate was 8.9% (35/395) for both HBsAg and HBeAg-positive women and 16.2% (22/136) for women with active chronic hepatitis. Multivariable-adjusted analyses showed women who were both HBsAg and HBeAg positive had a 47% higher risk of overall PTB (aRR 1.47, 95%CI, 1.04-2.09), a 2.03 times higher risk of spontaneous PTB (aRR 2.03, 95%CI, 1.38-2.99) and a 32% higher risk of iatrogenic PTB (aRR 1.32, 95%CI, 0.62-2.81), while women with chronic active hepatitis had a 3.84 times higher risk of overall PTB (aRR 3.84, 95%CI, 2.42-6.10), a 3.88 times higher risk of spontaneous PTB (aRR 3.88, 95%CI, 2.32-6.45) and a 3.01 times higher risk of iatrogenic PTB (aRR 3.01, 95%CI, 1.22-7.44). Different maternal clinical states of chronic HBV infection are independently associated with an increased risk of overall PTB and its subtypes (spontaneous and iatrogenic).

Significantly Decreased Islet β Cell Function is Closely Associated with Hyperglycemia in Chronic Hepatitis B Patients

AIM

This study is aimed at the characteristics of glucose metabolism and islet β cell function evaluated by the homeostasis model assessment of β cell function (HOMA-β) value and its risk factors in chronic hepatitis B (CHB) patients.

METHOD

This cross-sectional study recruited 110 CHB patients (CHB group) and 110 patients without hepatitis B virus (non-HBV group); the groups were matched according to sex, age, and body mass index under the same glucose metabolism status. The risk factors, characteristics, and differences in glucose metabolism and HOMA-β values between the two groups were analyzed.

RESULTS

The abnormal glucose metabolism rate was higher in CHB patients with liver cirrhosis (LC) or hepatitis B envelope antigen (HBeAg) (-) status. In addition, under the same glucose metabolism status, the fasting plasma glucose (FPG) levels and 2-hour postprandial plasma glucose (2h-PG) levels in the CHB group were higher, while the HOMA-β values were significantly lower and the homeostasis model assessment of insulin resistance (HOMA-IR) value was not higher than that in the non-HBV group (all P < 0.0001). Further analyses revealed that the main risk factors for abnormal glucose metabolism were HBeAg (-) status and hepatitis B envelope antibody levels. But HBV serological and virological indicators had no effects on the HOMA-β values.

CONCLUSION

Islet β cell function in patients with CHB was compromised, which is closely associated with fasting and postprandial hyperglycemia in chronic hepatitis B patients. Further research should be done to verify the compromised islet β cell function and then to investigate the mechanisms behind the effect of hepatitis B virus infection on islet β cell function in CHB patients.

Impact of maternal infection with hepatitis B virus on pregnancy complications and neonatal outcomes for women undergoing assisted reproductive technology treatment: A population-based study

The aim of this study was to investigate the impact of maternal hepatitis B virus (HBV) status on pregnancy complications and neonatal outcomes for women undergoing assisted reproductive technology (ART). A total of 7,011 pregnancies achieved by ART were included from a population-based database involving 523,111 pregnancies. Exposures of hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg) among pregnant women were routinely tested at the first antenatal visit for all pregnancies. We collected pregnancy complications (e.g., gestational diabetes mellitus [GDM], intrahepatic cholestasis of pregnancy [ICP]), neonatal outcomes and confounding variables from the same database. Univariate and multivariate analyses by adjusting confounders were conducted to evaluate the impact of maternal HBV infection. Prevalence of HBsAg seropositivity (HBsAg+) was 11.34% (95% CI 10.6-12.1) and that of HBsAg and HBeAg co-seropositivity (HBsAg+HBeAg+) was 2.55% (2.1-3.0) among included population. Compared with HBsAg-group, ICP risk in the HBsAg+group was higher (4.03% vs. 1.79%; adjusted odds ratio [aOR] 2.49, 1.65-3.77). Similarly, ICP prevalence in the HBsAg+HBeAg+ group was higher than that in the HBsAg-HBeAg- group (6.47% vs. 1.61%; aOR 4.78, 2.28-9.98). No associations were found between maternal HBV infection (i.e., HBsAg+, HBsAg+HBeAg+, or HBsAg+HBeAg-) and other adverse outcomes for women undergoing ART (i.e., GDM, pre-eclampsia, placental previa, premature separation of placenta, premature rupture of membranes, preterm birth and low birthweight) in this study. In conclusion, maternal HBV infection (HBsAg+or HBsAg+HBeAg+) probably increase ICP risk, but may not associate with other pregnancy complications or neonatal outcomes for pregnant women who underwent ART.

Chronic maternal hepatitis B virus infection and pregnancy outcome- a single center study in Kunming, China

Background

Chinese population has a high prevalence of chronic hepatitis B virus (HBV) infection, the impact of which on pregnancy outcome remains controversial. A single-center retrospective cohort study was performed in Kunming, a multi-ethnic city in south-western China to examine this issue.

Methods

The singleton pregnancies delivering at ≥28 weeks gestation under our care in 2005–2017 constituted the study cohort. Maternal characteristics and pregnancy outcome were compared between mothers with and without seropositivity for hepatitis B surface antigen (HBsAg) determined at routine antenatal screening.

Results

Among the 49,479 gravidae in the cohort, the 1624 (3.3%) HBsAg seropositive gravidae had a lower incidence of nulliparity (RR 0.963, 95% CI 0.935–0.992) and having received tertiary education (RR 0.829, 95% CI 0.784–0.827). There was no significant difference in the medical history, pregnancy complications, or labor or perinatal outcome, except that HBV carriers had significantly lower incidence of labor induction (RR 0.827, 95% CI 0.714–0.958) and of small-for-gestational age (SGA) infants (RR 0.854, 95% CI 0.734–0.994). On regression analysis, maternal HBV carriage was independently associated with spontaneous labor (aRR 1.231, 95% CI 1.044–1.451) and reduced SGA infants (aRR 0.842, 95% CI 0.712–0.997).

Conclusions

Our 3.3% prevalence of maternal HBV infection was around the lower range determined in the Chinese population. The association with spontaneous labor and reduced SGA infants could have helped to promote the perpetuation of the infection through enhanced survival of the offspring infected at birth, thus explaining the high prevalence in the Chinese population.

Viral hepatitis and pregnancy

The management of viral hepatitis in the setting of pregnancy requires special consideration. There are five liver-specific viruses (hepatitis A, B, C, D, E), each with unique epidemiology, tendency to chronicity, risk of liver complications and response to antiviral therapies. In the setting of pregnancy, the liver health of the mother, the influence of pregnancy on the clinical course of the viral infection and the effect of the virus or liver disease on the developing infant must be considered. Although all hepatitis viruses can harm the mother and the child, the greatest risk to maternal health and subsequently the fetus is seen with acute hepatitis A virus or hepatitis E virus infection during pregnancy. By contrast, the primary risks for hepatitis B virus (HBV), hepatitis C virus (HCV) and hepatitis D virus are related to the severity of the underlying liver disease in the mother and the risk of mother-to-child transmission (MTCT) for HBV and HCV. The prevention of MTCT is key to reducing the global burden of chronic viral hepatitis, and prevention strategies must take into consideration local health-care and socioeconomic challenges. This Review presents the epidemiology of acute and chronic viral hepatitis infection in pregnancy, the effect of pregnancy on the course of viral infection and, conversely, the influence of the viral infection on maternal and infant outcomes, including MTCT.

The safety and efficacy of tenofovir disoproxil fumarate used throughout pregnancy for mothers with chronic hepatitis B

BACKGROUND

Antiviral therapy throughout pregnancy in women with chronic hepatitis B (CHB) during pregnancy has been suggested; however, the data of tenofovir disoproxil fumarate (TDF) are limited. The aim of this study was to evaluate the safety and efficiency in women with CHB.

METHODS

It was a single-center, retrospectively study. Eighty-one women received TDF 300 mg/day before pregnancy. Sixty-three women did not receive antiviral treatment. All infants in both groups received immunoprophylaxis. Mothers and infants were followed at least postpartum 7 months. The primary endpoint was the safety of mothers and infants. The secondary endpoints were mother-to-child transmission (MTCT) rate and hepatitis B virus (HBV) DNA suppression.

RESULTS

TDF was well tolerated in the mothers. The rates of neonatal congenital abnormalities were similar between the two groups (3.7% or 3/81 versus 3.3% or 2/63, P = 1.000). There were also no significant differences in infant length and weight, Apgar score (1 minute), rate of low birth weight, gestational age, or rate of cesarean section between the two groups. TDF significantly reduced the viral load (3.4 ± 0.5 log IU/mL versus 6.3 ± 1.5 log IU/mL, P < 0.001) and the ALT levels (19.9 ± 10.2 versus 46.8 ± 44.8 U/L, P < 0.001) before delivery. At 7-month postpartum, the MTCT rate was 0% in the TDF-treated group when compared with 6.3% (4/63) in the untreated group (P = 0.035).

CONCLUSION

TDF used throughout pregnancy can safely reduce the rate of MTCT.

Chronic hepatitis B infection and the risk of gestational diabetes: a cross-sectional study

OBJECTIVE

An estimated two billion people worldwide live with hepatitis B virus (HBV) infection. Many of these are women of reproductive age. Studies that have examined pregnancy outcomes in women living with HBV have reported conflicting results in relation to the incidence of gestational diabetes (GDM). The aim of this study is to examine if gestational diabetes is more common in women with chronic HBV residing in a non-Asian country.

DESIGN

Cross-sectional study.

SETTING

Victoria, Australia.

POPULATION

All singleton births between 2009 and 2017.

METHODS

Poisson regression was performed to determine whether gestational diabetes is more common in women with HBV than in women without HBV taking into account other risk factors such as maternal age, body mass index (BMI), parity and country of birth.

MAIN OUTCOME MEASURE

Gestational diabetes diagnosis in women with chronic HBV infection.

RESULTS

For women with HBV, the unadjusted incidence risk ratio for GDM was 1.75 (95% CI 1.6-1.9). After adjusting for region of birth, BMI, parity, age and smoking, the adjusted incidence risk ratio was 1.2 (95% CI 1.1-1.3). The highest incidence (37.1%) of GDM was in women with HBV and a BMI of >40.

CONCLUSIONS

The findings from this study confirm an association between HBV and GDM.

TWEETABLE ABSTRACT

HBV is associated with GDM with an incidence risk ratio for GDM of 1.75 (95% CI 1.6-1.9).

Hepatitis B - chronic carrier status and pregnancy outcomes: An obstetric perspective

Antenatal screening for hepatitis B surface antigen (HBsAg) only identifies women with hepatitis B virus (HBV) infection for neonatal immunoprophylaxis. It does not reflect the phase of chronic infection, viral genotype and activity, hepatic inflammation, or other co-existing liver disorders. Coinfection with other viruses and micro-organisms may also be present. These factors in various combinations can impact pregnancy outcomes, and they are probably responsible for the conflicting literature on this issue. Pregnancy complications may interact with maternal HBV infection and hepatitis flares, leading to serious and lethal complications. Hepatitis flares are common especially postpartum, and they are unpredictable and unpreventable with antiviral treatment. Evidence on the association between HBsAg seropositivity with gestational diabetes mellitus, preterm birth, increased foetal growth, and reduced pregnancy hypertensive disorders is stronger than other adverse pregnancy outcomes. Baseline assessment of liver function, and viral markers and activity, can delineate the truly high-risk pregnancies for close monitoring.

Pregnancy outcomes for pregnant women with chronic hepatitis B exposing to entecavir or adefovir dipivoxil therapy before or in early pregnancy

Background: Entecavir (ETV) or adefovir dipivoxil (ADV) are not recommended during pregnancy because of embryotoxicity or teratogenicity found in animal studies; however, information on the safety of ETV or ADV in humans is limited.Aims: The aim of this study was to investigate the safety of ETV or ADV in women with chronic hepatitis B (CHB).Methods: We retrospectively enrolled 152 pregnant women with CHB who exposed to ETV or ADV in the first trimester of pregnancy. All the mothers were followed until postpartum 7 months. All newborns received immunoprophylaxis. The primary endpoint was the safety of mothers and infants. The secondary endpoint was the rate of mother-to-child transmission (MTCT) of hepatitis B virus (HBV).Results: The pregnant women were divided into two groups. Group 1 included 20 pregnant women who became unplanned pregnancy with ETV or ADV treatment. All of them switched to TDF before 7 weeks of gestation. There were 20 women with 20 pregnancies and 18 live births. Group 2 included 132 with TDF before conception. There were 132 women with 141 pregnancies and 125 live births. The abortion rate of Group 1 was not higher than that in Group 2 (10.0 versus 10.6%, p = 1.000). The birth defect rate in Group 1 did not statistically differ from Group 2 (5.6 versus 4.8%, p = 1.000). There were no significant differences of gestational complications between the two groups. The rate of MTCT of HBV is 0%.Conclusions: Among infants exposed to ETV or ADV before conception, ETV or ADV was not associated with a higher risk for adverse birth outcomes.

Maternal HBsAg carriers and adverse pregnancy outcomes: A hospital-based prospective cohort analysis

It is not clear whether chronic hepatitis B virus (HBV) infection during pregnancy can increase the risk of adverse pregnancy outcomes for both mothers and neonates. We conducted a hospital-based prospective cohort study on pregnant women (PW) and used an analysis strategy that was guided by directed acyclic graphs (DAGs). Maternal characteristics and major adverse pregnancy outcomes were collected both from questionnaires and hospital-based electronic medical records. Serum hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg) status were determined. In total, 3329 of the 3416 pregnant women who received routine antenatal care in a hospital setting at baseline, including 346 HBsAg carriers, were available for analysis. Maternal HBsAg carrier status was associated with an increased risk of intrahepatic cholestasis pregnancy [aOR (adjusting odds ratio) = 1.70; 95% CI (confidence interval) = 1.16-2.49], premature rupture of the membranes (aOR = 1.38; 95% CI = 1.00-1.89) and large for gestational age birth aOR = 1.67; 95% CI = 1.17-2.39). The risk of intrahepatic cholestasis remained in pregnant women with either HBeAg-positive (aOR = 2.96; 95% CI = 1.33-6.62) or HBeAg-negative (aOR = 1.52; 95% CI =1.00-2.32)] status; notably, only maternal HBeAg-negative status was associated with a higher risk of large for gestational age birth (aOR = 1.91; 95% CI = 1.33-2.76). Our results implied that chronic HBV infection during pregnancy may increase the risk of intrahepatic cholestasis of pregnancy, premature rupture of membranes and large for gestational age pregnancies.

Pattern and predictors of medical care received by hepatitis B carriers during pregnancy and after delivery

OBJECTIVE

The objective of the study is to evaluate the pattern and predictors of medical care received by hepatitis B virus (HBV) carriers during pregnancy and after delivery in Hong Kong.

STUDY DESIGN

The study is a retrospective analysis.

METHODS

Pregnant HBV carriers and their infants were followed up for 9-12 months after delivery. Face-to-face interviews were conducted to investigate what medical care they received for HBV before, during and after pregnancy.

RESULTS

Data were available for 412 HBV carriers. A total of 375 (91.0%) women were known HBV carriers before pregnancy. Routine antenatal screening picked out the remaining 37 (9.0%) HBV carriers; these women were younger, more likely to be smokers and had a lower level of education (P < 0.05) than known HBV carriers. In total, 356 of 412 (86.4%) HBV carriers did not receive any medical care for HBV during pregnancy. Known HBV carrier status, history of medical check-up and the use of antiviral treatment before pregnancy were significant predictors for HBV medical care during pregnancy (P < 0.05). The results show that 217 of 412 (52.6%) HBV carriers did not receive medical care for HBV after delivery. HBV medical care before pregnancy, use of antiviral treatment before pregnancy and a higher level of education were significant predictors for postpartum HBV medical care (P < 0.05). Multivariate analysis showed that HBV medical care before pregnancy (odds ratio [OR], 7.73; 95% confidence interval [CI], 3.21-18.65; P < 0.001) and the use of antiviral treatment (OR, 5.02; 95% CI, 1.41-17.81; P = 0.013) were associated with medical care during pregnancy. Medical care before pregnancy was also associated with postpartum HBV medical care (OR, 5.05; 95% CI, 3.29-7.51; P < 0.001).

CONCLUSIONS

A significant proportion of HBV carriers did not receive HBV-related medical check-ups during and after pregnancy in Hong Kong despite the majority being aware of their carrier status. Medical care before pregnancy predicted antenatal and postpartum HBV medical care.