HCV in Pregnancy

Testing

Recommendations for HCV Testing in Pregnant Women

RECOMMENDED RATING
There is no recommendation at this time for universal HCV screening in pregnant women, however this is under review. II, C
Screening with an HCV antibody assay is recommended for pregnant women with known or suspected risk factors for HCV infection. Confirmatory HCV nucleic acid testing is recommended for women with a positive screening test. I, A

Current US Centers for Disease Control and Prevention (CDC) screening guidelines (CDC, 1998); (Smith, 2012a) recommend that any woman—pregnant or otherwise—with a known or suspected risk factor, such as injection drug use or HIV infection, should be tested for HCV infection (see HCV Testing and Linkage to Care); (Koneru, 2016). Screening for HCV antibody should be followed by confirmatory nucleic acid testing (HCV RNA) for anyone positive on the screening assay (CDC, 2013) to differentiate past versus current, active infection. Women found to be HCV-infected should be linked to clinical care services for their infection(s) and drug dependence treatment, as needed.

With current increases in HCV infection among young adults, including women of childbearing age, there is considerable discussion about the possibility of universal screening of pregnant women (Ly, 2017). Identifying HCV as women engage in prenatal care would allow appropriate assessment of liver disease status as well as establish care for their exposed children. This public health consideration will be weighed with concerns regarding potential cost and the logistics of linking patients to care.

Whom to Treat

Recommendation Regarding HCV Treatment and Pregnancy

RECOMMENDED RATING
For women of reproductive age with known HCV infection, antiviral therapy is recommended before considering pregnancy, whenever practical and feasible, to reduce the risk of HCV transmission to future offspring. I, B

 

Not Recommended Regarding HCV Treatment and Pregnancy

NOT RECOMMENDED RATING
Treatment during pregnancy is not recommended due to the lack of safety and efficacy data. IIb, C

 

Women of reproductive age with HCV should be counseled about the benefit of antiviral treatment prior to pregnancy to improve the health of the mother and eliminate the low risk of mother-to-child transmission (MTCT). The safety of direct-acting antivirals (DAAs) in pregnancy is unknown, and there are no data on the effect of DAAs on male or female fertility. However, ribavirin is contraindicated in pregnancy due to its known teratogenicity. In addition, the risk for teratogenicity persists for up to 6 months after ribavirin cessation and applies to women taking ribavirin and female partners of men taking ribavirin. Women who become pregnant while on DAA therapy (with or without ribavirin) should discuss the risks versus benefits of continuing treatment with their physicians. If exposed to ribavirin, they should also have their maternal and fetal outcomes reported to the ribavirin pregnancy registry (see also, Recommended Monitoring for Pregnancy-Related Issues Prior to and During Antiviral Therapy That Includes Ribavirin). 

Monitoring During Pregnancy

Recommendations for Monitoring HCV-Infected Women During Pregnancy

RECOMMENDED RATING
HCV RNA and routine liver function tests are recommended at initiation of prenatal care for HCV-antibody–positive pregnant women to assess the risk of mother-to-child transmission (MTCT) and degree of liver disease.  I, B
All pregnant women with HCV infection should receive prenatal and intrapartum care that is appropriate for their individual obstetric risk(s) as there is no currently known intervention to reduce MTCT. I, B
In HCV-infected pregnant women with pruritus or jaundice, there should be a high index of suspicion for intrahepatic cholestasis of pregnancy (ICP) with subsequent assessment of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and serum bile acids. I, B
HCV-infected women with cirrhosis should be counseled about the increased risk of adverse maternal and perinatal outcomes. Antenatal and perinatal care should be coordinated with a maternal-fetal medicine (ie, high-risk pregnancy) obstetrician. I, B

 

Pregnancy Impact on HCV Infection

Pregnancy itself does not appear to negatively affect chronic HCV infection. In general, serum ALT levels decrease during the first and third trimesters of pregnancy and increase after delivery. HCV RNA levels rise during the first and third trimesters, reaching a peak during the third trimester, and decrease postpartum (Conte, 2000); (Gervais, 2000). These effects are likely due to the immunosuppressive effects of pregnancy. HCV-infected pregnant women have a higher incidence of intrahepatic cholestasis of pregnancy (ICP) (pooled OR 20.40 [95% CI, 9.39-44.33, I2=55%]) based on a meta-analysis of 3 studies when compared to noninfected pregnant women (Wijarnpreecha, 2017). ICP is associated with an increased rate of adverse maternal and fetal outcomes; all patients with this syndrome should be immediately referred to a high-risk obstetrical specialist for monitoring and treatment.

HCV Infection Impact on Pregnancy and Perinatal Outcomes

Although some studies show an increased risk of adverse perinatal outcomes (eg, preterm delivery, low birth weight infants, and congenital anomalies) with maternal HCV infection, these risks are confounded by comorbid conditions, such as substance use (Connell, 2011). However, pregnant women with cirrhosis are at increased risk for poor maternal outcomes (ie, preeclampsia, cesarean section, hemorrhagic complication, and death) and neonatal outcomes (ie, preterm delivery, low birth weight, and neonatal death) (Puljic, 2016); (Tan, 2008). Women with cirrhosis should be counseled about these increased risks and care should be coordinated with specialists in maternal-fetal medicine.

Hepatitis C MTCT occurs at an overall rate of 5% to 15% (Mast, 2005); (Ceci, 2001); (Shebl, 2009); (Jhaveri, 2015), with the number that progress to chronic infection being 3% to 5%. No specific risk factor predicts transmission and no specific intervention (eg, antiviral, mode of delivery, or others) has been demonstrated to reduce transmission—except for suppression of HIV replication in women with HIV/HCV coinfection (Checa Cabot, 2013). Given the potential associated risk of MTCT, it is advisable to avoid invasive procedures (eg, fetal scalp monitors and forceps delivery).

The neuropsychiatric and systemic side effects of interferon-based agents and the pregnancy category X rating of ribavirin made studies involving these drugs to interrupt MTCT untenable for safety reasons. It is important to note that DAAs have not been studied as a way to interrupt MTCT. These drugs have not demonstrated significant toxicity in animal studies, and antiviral medication use has become the standard of care for people with HIV and hepatitis B infection. Therefore, it is realistic to think that DAAs could be used in the future to interrupt MTCT. However, with a low transmission rate, improved methods to identify mothers who are likely to transmit are needed to reduce the number needed to treat below 20 to prevent 1 transmission event. DAA therapy is not recommended during pregnancy to reduce MTCT due to the current lack of safety and efficacy data.

Postpartum Issues

Recommendations Regarding Breastfeeding and Postpartum Care for HCV-Infected Women

RECOMMENDED RATING
Breastfeeding is not contraindicated in women with HCV infection, except when the mother has cracked, damaged, or bleeding nipples, or in the context of HIV coinfection. I, B
Women with HCV infection should have their HCV RNA reevaluated approximately 9 to 12 months after delivery to assess for spontaneous clearance. I, B

HCV and Breastfeeding

Breastfeeding is not a risk for HCV MTCT (CDC, 1998) with studies showing similar rates of maternal infection in breast-fed and bottle-fed infants (Resti, 1998). However, given the associated risks of HCV transmission with blood exposure and HIV transmission with breastfeeding, we recommend that HCV-infected women who breastfeed abstain from doing so while their nipples are cracked, damaged, or bleeding, or in the context of HIV/HCV coinfection.

Spontaneous Clearance in the Postpartum Period

HCV RNA levels can fluctuate during pregnancy and the postpartum period. The most frequently observed pattern is a steady rise in HCV RNA levels during pregnancy followed by a slight or significant drop (>3-4 log) in the postpartum period (Lin, 2000). This is most likely due to the release of tolerance in HCV-specific T lymphocyte responses that develops during pregnancy (Honegger, 2013). Spontaneous clearance of HCV can occur in the postpartum period. Previous studies with small numbers of patients demonstrated that up to 10% of postpartum women became HCV RNA undetectable (Hattori, 2003); (Lin, 2000); (Honegger, 2013). A recent study from Egypt demonstrated a 25% rate of spontaneous resolution that was strongly associated with the favorable IL28B allele (Hashem, 2017).

Given these findings, women should have their HCV RNA reevaluated within 9 to 12 months after delivery. In that time, HCV RNA could become undetectable or rebound to prepregnancy levels. The possibility of spontaneous viral clearance should be considered for any woman who is being assessed for DAA treatment in the postpartum period.

  • Related References
Last update: 
September 21, 2017
Top