California's Black Infant Health program rests on one outcome study and a 2007 RCT

In 2023, Black women in the United States died from pregnancy-related causes at 50.3 deaths per 100,000 live births, 3.5 times the rate for white women (Hoyert, NCHS Health E-Stats, 2025). The gap is the reason race-specific programs like California's Black Infant Health exist. A discrimination lawsuit filed by a woman named Erica Jimenez after she was denied enrollment has put the program back in the news without clarifying what the clinical evidence on it actually shows. We read the published record.

California's Black Infant Health program, known as BIH, has operated in most counties with significant Black populations since the late 1980s. It enrolls Black pregnant women and birthing people in group and individual sessions during pregnancy and for up to six months postpartum, delivered in small cohorts facilitated by Black staff. The program model combines CenteringPregnancy-style group prenatal care, case management, home visiting, and stress-and-racism-informed social support. Federal Healthy Start, run by HRSA's Maternal and Child Health Bureau, operates parallel programs in more than 100 sites.

The single published outcome evaluation of BIH is a 2004 paper in the Journal of the National Medical Association. Winnie Willis and colleagues tracked 1,553 BIH participants who entered the program before 32 weeks of gestation between 1996 and 1998 and compared them to 11,633 African-American women in the same California ZIP codes (Willis et al., JNMA 2004, PMID 15040513). BIH participants had a very-low birth weight rate of 1.9 percent versus 3.0 percent in the comparison group, and a very-preterm birth rate of 3.5 percent versus 4.3 percent. The study did not find a statistically significant difference on overall low birth weight or overall preterm birth.

The authors flagged one methodological wrinkle: BIH retained higher-risk women than the geographic comparison group, which makes the reported direction of effect conservative rather than inflated. No modern replication has been published.

The group prenatal care model at the center of BIH has its own evidence base. A 2007 randomized trial in Obstetrics and Gynecology assigned 1,047 predominantly African-American pregnant women, ages 14 to 25, at academic clinics in New Haven and Atlanta to either CenteringPregnancy group care or standard individual care (Ickovics et al., PMID 17666608). Women in group care had a 33 percent lower risk of preterm birth overall (adjusted odds ratio 0.67, 95 percent confidence interval 0.44 to 0.99). The effect was larger in the African-American subgroup: 10.0 percent preterm birth in group care versus 15.8 percent in standard care, adjusted odds ratio 0.59. Group-care participants were also more satisfied with care and more likely to initiate breastfeeding.

Read together, the two studies give BIH a partial answer. The program model rests on a randomized trial with a strong African-American subgroup effect. The BIH-specific outcome evaluation is 22 years out of date.

The most recent qualitative work on BIH is from 2022. Sarah Kemet and colleagues ran a focus group of 11 Black women enrolled in BIH and published the themes in Maternal and Child Health Journal (Kemet et al., PMID 34519952). Participants named mental health care as the single most important addition they wanted to the program, alongside racially concordant staff and concrete advocacy through clinical and social systems. "When I think of mental healthcare, I think of no care," one participant told the researchers, and the research team kept her sentence as the title of the paper.

The Jimenez lawsuit is a legal challenge to BIH's race-specific enrollment criteria. Courts will decide whether race-specific eligibility survives under current case law. The published clinical and public health evidence does not speak to that question. What the evidence does show is that the disparity BIH is designed to address is unambiguous, that the program's intervention model has randomized support for the African-American population specifically, and that the program-specific outcome evaluation has not been renewed in the last two decades.

If you live in California, check whether your county runs BIH at the state's Black Infant Health page. If you live outside California and your community does not have an equivalent program, ask your prenatal clinic whether they offer CenteringPregnancy or another group prenatal care program. That is the intervention with the strongest randomized evidence for reducing preterm birth in African-American women. Black Mamas Matter Alliance and the National Birth Equity Collaborative track state-by-state maternal health policy and publish resource lists for pregnant readers.