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Brief Report: Birth and Infant Growth Outcomes After Prenatal Exposure to Bictegravir
Misgana Woldemeskel1,2, Justin Unternaher3,4, Olivia Munger3
1Department of Global Health, George Washington University Milken Institute School of Public Health, Washington, DC.
Insights
Bictegravir (BIC) use during pregnancy is increasingly common, but infant outcomes are not well-documented. This study found that most HIV-exposed infants (HEIs) exposed to BIC prenatally had normal birth weights and early growth indicators.
Area of Science:
- Obstetrics and Gynecology
- Pediatrics
- Infectious Diseases
Background:
- Limited data exist on infant health outcomes following maternal use of bictegravir (BIC) during pregnancy.
- Evaluating these outcomes is crucial given the increasing use of BIC in pregnant individuals with HIV.
Purpose of the Study:
- To assess birth and early growth outcomes in HIV-exposed infants (HEIs) with prenatal exposure to bictegravir (BIC).
Main Methods:
- A retrospective cohort study analyzed data from 60 HIV-exposed infants born between 2019-2022.
- Infant outcomes including birth measurements, HIV status, and growth indicators (head circumference, weight-for-length, length-for-age) were assessed.
- Data were analyzed using descriptive statistics, comparing outcomes based on the duration of maternal BIC exposure during pregnancy.
Main Results:
- Most infants (92%) had normal head circumference, 85% had normal weight-for-length, and 92% had normal length-for-age.
- Abnormal growth indicators were observed in a minority of infants (8-15%), with no clear association to the duration of BIC exposure.
- The majority of infants (95%) were confirmed HIV-negative, and maternal viral load was suppressed in 70% of cases.
Conclusions:
- Prenatal exposure to bictegravir (BIC) was associated with favorable birth outcomes in most HIV-exposed infants.
- Early growth indicators in infants exposed to BIC during gestation were generally normal, regardless of exposure duration.
Background:
Despite increasing bictegravir (BIC) use during pregnancy, infant health outcomes data remain limited. We evaluated birth and growth outcomes among HIV-exposed infants (HEI) with prenatal maternal BIC exposures.
Methods:
A retrospective cohort study of HEIs with prenatal BIC exposure at Children's National Hospital during 2019-2022. Infant (birth outcomes, HIV status, and growth indicators) and maternal (demographics, viral load, and BIC use in pregnancy) data were obtained from medical records. Descriptive statistics were used to summarize infant head circumference (HC) at 0-1 month and weight-for-length (WFL) and length-for-age (LFA) at 2-3 months using mean z -scores overall and by duration of BIC exposure.
Results:
A total of 60 mothers (median age = 34 years [interquartile range: 26-37], 50% Black, 70% with latest HIV RNA < 50 copies/mL) used BIC in pregnancy and delivered 60 HEIs (88% term, 12% preterm, median birth weight = 3.2 kg [interquartile range: 2.8-3.4]). Twenty-eight (46%) mothers initiated BIC preconception or in the first trimester. Most (73%) mothers continued BIC through delivery, 10% discontinued in the first trimester, 27% initiated in second and third trimester, and 17% had unknown duration. Most infants had normal HC (n = 49, 92%), WFL (n = 52, 85%), and LFA (n = 51, 92%). Abnormal HC (n = 4), WFL (n = 8), and LFA (n = 4) were observed in 8% (95% confidence interval [CI]: 2.3%, 19.6%), 15% (95% CI: 6.9%, 28.1%), and 8% (95% CI: 2.2%, 18.9%), respectively, with no relationship to the duration of BIC exposures. Fifty-seven (95%) HEIs were definitively HIV-negative; 3 (5%) HEIs were lost to care.
Conclusion:
Most HEIs with prenatal BIC exposure had favorable birth outcomes and exhibited normal early growth.
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