Safety and Efficacy of B/F/TAF in Pregnancy

Effectiveness and Safety of Bictegravir/Emtricitabine/Tenofovir Alafenamide in Pregnant Women With HIV Infection（BIP STUDY）.

This is a prospective, multicenter, observational study designed to evaluate the effectiveness and safety of Bictegravir/Emtricitabine/Tenofovir Alafenamide (B/F/TAF) in pregnant women living with HIV. Given the limited prospective data on B/F/TAF use during early pregnancy, this study aims to address the evidence gap by observing women who are on B/F/TAF for at least six months with sustained viral suppression (HIV RNA <50 copies/mL) and are within the first trimester. Participants will continue B/F/TAF throughout pregnancy and up to 12 weeks postpartum per routine clinical practice. No experimental intervention will be assigned. The primary objective is to assess the proportion of participants achieving HIV RNA <50 copies/mL at 12 12 weeks of pregnancy. Secondary objectives include maternal viral suppression at 28 weeks, delivery, and postpartum; safety and tolerability; maternal and neonatal outcomes including congenital anomalies, APGAR scores, infant HIV status, and growth parameters. The study will enroll at least 50 participants across five clinical centers in China. Findings will provide real-world evidence on the use of B/F/TAF as an alternative integrase inhibitor-based regimen for pregnant women with HIV.

Study Overview

• Status: Enrolling by invitation
• Conditions: HIV
• Intervention / Treatment: Drug: BIC+FTC+TAF

Detailed Description

Statistical Methods Descriptive statistics will be used to summarize the data. Continuous variables will be presented as means with standard deviations and medians with interquartile ranges, depending on the distribution of the data. Categorical variables will be described by their frequency distribution and ranges (Two-sided 95% confidence).

Efficacy:

The proportion of participants with plasma HIV RNA <50 copies/mL at the time of delivery will be summarized using the missing = excluded approach for imputing missing HIV RNA values.

Safety:

The adverse events (AE) data will be listed by subject. Treatment-emergent AEs, Grade 1-4 AEs will be summarized by system organ class, and preferred term using the current version of the Medical Dictionary for Regulatory Activities (MedDRA), and graded according to the DIADS Table for Grading the Severity of Adult and Pediatric Adverse Events .

Listings of individual subject vital signs, 12-lead ECG parameters, and laboratory results will be provided. Laboratory abnormalities will be graded for severity using the DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events. Laboratory results and changes from baseline for vital signs and selected lab tests will be summarized at scheduled visits. The incidence and grade of treatment-emergent laboratory abnormalities will be summarized accordingly.

Maternal/neonatal outcomes analysis Proportion of infants with confirmed negative or positive HIV RNA testing will be summarized using the missing = excluded approach for imputing missing HIV RNA values.

Proportion of live births, stillbirths, and pregnancy loss will be summarized. APGAR scores will be summarized. Adverse events and toxicity management

Definitions of Adverse Events, Adverse Reactions, and Serious Adverse Events:

Adverse Events An AE is any untoward medical occurrence in a clinical study subject administered a pharmaceutical product, which does not necessarily have a causal relationship with the treatment. An AE can therefore be any unfavorable and/or unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. AEs may also include lack of efficacy, overdose, drug abuse/misuse reports, or occupational exposure.

• Study Type: Observational
• Enrollment (Estimated): 50

Contacts and Locations

Study Locations

• China
  • Hubei
    • Wuhan, Hubei, China, 430071
      • Zhongnan Hospital of Wuhan University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

Pregnant women with HIV who receiving B/F/TAF for at least 6 months, virus suppressed (VS) for more than 6 months and who are in first trimester.

Description

Inclusion Criteria:

1. Women with aged 18 years or older and confirmed HIV infection.
2. Currently on B/F/TAF for 6 months preceding the screening visit.
3. Documented plasma HIV RNA<50 copies/mL for 6 months preceding the screening visit and have HIV RNA<50 copies/mL at the screening visit.
4. Women within 12 weeks of pregnancy at the time of screening.
5. The ability to understand and sign a written informed consent form, which must be obtained prior to initiation of study procedures.

Exclusion Criteria:

1. Have active hepatitis C virus (HCV) infection.
2. An opportunistic illness indicative of stage 3 HIV diagnosed within the 30 days prior to screening.
3. Other clinical scenarios that are no longer suitable for B/F/TAF therapy (Such as electrocardiogram, liver and kidney dysfunction, opportunistic infection and so on).

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
B/F/TAF; Pregnant women who will be exposed to B/F/TAF in the first trimester.	Drug: BIC+FTC+TAF; Participants who are on B/F/TAF for at least 6 months, virus suppressed (VS) for more than 6 months and who are in first trimester

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Proportion of Participants with HIV RNA <50 Copies/mL at 12 Weeks of Pregnancy	The proportion is calculated using the Missing=Excluded approach (participants with missing HIV RNA values at the 12-week time point are excluded from both numerator and denominator).	12 weeks of pregnancy.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Maternal Plasma HIV RNA Level	HIV RNA levels are measured in copies/mL. Descriptive statistics (geometric mean, median, and interquartile range) will be reported at each specified time point.	28 weeks of pregnancy, at delivery, and 2-12 weeks postpartum
Number of Participants with Treatment-Emergent Grade 3 or 4 Adverse Events	Adverse events are graded according to the DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events. Only events that are treatment-emergent (occurring or worsening after study drug initiation) and of Grade 3 or 4 severity are reported.	From enrollment through 12 weeks postpartum
Occurrence of Congenital Anomalies	Congenital anomalies are identified through prenatal ultrasound examinations, prenatal diagnostics (e.g., amniocentesis with genetic/epigenetic testing), and postnatal physical examination. Each anomaly is reported as a separate event.	From birth through 12 weeks postpartum
Pregnancy Outcome: Live Birth vs. Fetal Loss/Stillbirth	Pregnancy outcomes are categorized as live birth, fetal loss (spontaneous abortion <20 weeks), or stillbirth (fetal death ≥20 weeks). The proportion of each category will be reported.	At delivery
Infant APGAR Score	APGAR score is assessed at 1 and 5 minutes post-delivery. Scores range from 0 to 10, with higher scores indicating better condition. If asphyxia is present, an additional assessment is performed at 10 minutes. Descriptive statistics (mean, standard deviation, median, range) will be reported for each time point.	At 1 minute and 5 minutes after delivery
Number of Infants with Confirmed Positive HIV RNA Test Result	HIV RNA testing is performed at birth, 6 weeks of age, and 12 weeks of age. A confirmed positive result requires two consecutive positive tests. Infants with negative or indeterminate results at all time points are considered uninfected.	From birth through 12 weeks of age
Infant Weight	Infant weight is measured in grams at the time of delivery. Descriptive statistics (mean, standard deviation, median, range) will be reported.	At delivery
Infant Length	Infant length is measured in centimeters at the time of delivery. Descriptive statistics (mean, standard deviation, median, range) will be reported.	At delivery
Results of Neonatal Cardiac Ultrasound	Cardiac ultrasound is performed on the neonate at delivery. Findings are categorized as normal, abnormal-minor finding not requiring intervention, or abnormal-major finding requiring further evaluation or intervention. The number and proportion of infants in each category will be reported.	At delivery

Collaborators and Investigators

• Sponsor: Shi Zou

Study record dates

Study Major Dates

• Study Start (Actual): February 9, 2026
• Primary Completion (Estimated): December 31, 2026
• Study Completion (Estimated): June 30, 2027

Study Registration Dates

• First Submitted: June 9, 2026
• First Submitted That Met QC Criteria: June 18, 2026
• First Posted (Actual): June 24, 2026

Study Record Updates

• Last Update Posted (Actual): June 24, 2026
• Last Update Submitted That Met QC Criteria: June 18, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Keywords: HIV; pregnant women
• Other Study ID Numbers: CO-US-380-7588

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: Yes