The study, led by Moe Takenoshita of Stanford University and colleagues and published in the Journal of Clinical Sleep Medicine, recruited adults who had delivered a live infant at two academic US centers. Unlike many earlier investigations that relied solely on self-administered questionnaires, the team used the Structured Clinical Interview for Sleep Disorders, Revised, known as SCISD-R, which is considered the diagnostic standard for identifying sleep disorders. Participants were invited to complete the interview along with a battery of validated sleep surveys when they reached six weeks postpartum, and recruitment continued until 150 completed interviews had been obtained. Of 188 patients who accepted an invitation, 150 completed the assessment, a completion rate of 79.8 percent. Interviews took place on average 44 days, or about six weeks, after delivery, and the participants had a mean age of 33 years.

The results paint a layered picture of postpartum sleep. Twenty women, or 13 percent of the sample, met full diagnostic criteria for insomnia disorder, meaning their sleep difficulties were persistent, distressing, and impairing enough to constitute a clinical condition rather than an expected reaction to infant care. A considerably larger group, 38 women or 25.3 percent, reported insomnia symptoms that fell short of the diagnostic threshold. Perhaps most striking, only two of the women who met criteria for the disorder had ever received a clinical evaluation for their sleep problem, underscoring how rarely postpartum insomnia is recognized in ordinary care.

The researchers also characterized sleep more broadly using patient-reported outcome measures developed through the PROMIS initiative, which quantifies sleep disturbance and sleep-related impairment on standardized T scores. Among the 144 respondents with complete survey data, the median score for sleep disturbance was 51, with an interquartile range of 45 to 56, and the median score for sleep-related impairment was 57, with an interquartile range of 50 to 62. Those values indicate that most women in the sample showed normal levels of sleep disturbance but mild sleep-related impairment, meaning that even when the amount and quality of their sleep looked unremarkable on standardized scales, the daytime consequences, such as fatigue and reduced functioning, were already measurable. The median score on the Bergen Insomnia Scale, a validated measure of insomnia symptoms, was 20 with an interquartile range of 14 to 27.

Subjective sleep experience told an even more concerning story. Fifty-one percent of participants reported low or very low satisfaction with their sleep, and 70 percent reported sleeping six hours or less per night, well below the seven or more hours recommended for healthy adults by a joint consensus of the American Academy of Sleep Medicine and the Sleep Research Society. In other words, even among women who did not meet criteria for a diagnosable disorder, the majority were operating on severely restricted sleep at a time when recovery from childbirth, infant feeding, and the emotional demands of new parenthood all place heavy demands on physical and mental reserves.

To understand who was most at risk, the team examined a range of demographic and clinical variables as potential risk factors for insomnia disorder, reporting univariate odds ratios with 95 percent confidence intervals. No statistically significant associations emerged. The authors are careful about how they interpret this null result: with only 20 diagnosed cases in a sample of 150, the study was likely underpowered to detect real risk factors rather than having genuinely found that none exist. This is a common dilemma in prospective postpartum research, where recruiting and interviewing large numbers of women in a narrow postpartum window is logistically demanding, and it means that the question of which women are most vulnerable remains open for larger studies to answer.

An important secondary aim was exploratory: could the shorter questionnaires stand in for the lengthy diagnostic interview? Using receiver operating characteristic, or ROC, curve analysis, the researchers evaluated how well the Bergen Insomnia Scale, the PROMIS sleep disturbance measure, and the PROMIS sleep-related impairment measure identified insomnia disorder as diagnosed by the SCISD-R. The area under the curve values were 0.73 for the Bergen Insomnia Scale, 0.85 for PROMIS sleep disturbance, and 0.70 for sleep-related impairment. An area under the curve of 0.85 suggests that the PROMIS sleep disturbance survey has moderately strong discriminative ability, approaching the performance one would want in a screening instrument, while the other two measures performed more modestly. These results suggest that a brief, well-chosen questionnaire could plausibly serve as a first-line screening tool in postpartum care, with diagnostic interviews reserved for those who screen positive.

The clinical significance of the findings extends beyond the headline prevalence figure. Insomnia disorder is the most common sleep disorder of the postpartum year, accounting for up to 68 percent of sleep disorders diagnosed in that period, yet prevalence estimates across earlier studies have varied widely, in part because most relied on questionnaires rather than diagnostic interviews and because sleep disruption from newborn care is easily mistaken for, or intertwined with, true insomnia. A key diagnostic distinction is that insomnia disorder involves difficulty sleeping despite adequate opportunity for sleep, often accompanied by conditioned arousal and persistent worry about sleep that persists even when the infant allows rest. By applying a structured diagnostic interview at a standardized postpartum time point, the new study offers a cleaner estimate of how many women have crossed from disrupted sleep into disorder by six weeks after delivery.

The consequences of untreated postpartum insomnia are not trivial. Prior research has linked poor maternal sleep to depressive symptoms, with fragmented sleep correlating more strongly with postpartum depression than infant temperament, and to impaired mood, cognition, and interpersonal functioning. Sleep problems in mothers can also affect infants, since maternal emotion and sleep conditions influence infant sleep patterns, and bidirectional associations between maternal and infant sleep and maternal mental health have been documented from late pregnancy through the second year postpartum. Professional bodies, including the American College of Obstetricians and Gynecologists, have called for optimizing postpartum care, and the new findings suggest that sleep should be an explicit part of that conversation at the six-week postpartum visit, a checkpoint that many women attend and that could serve as a natural screening opportunity.

The authors also highlight a subtler message about how sleep medicine frameworks classify postpartum problems. Beyond the 13 percent who met criteria for insomnia disorder, a larger population of women endorsed clinically meaningful sleep disturbance and sleep-related impairment without meeting the threshold for a sleep disorder diagnosis. That gray zone, they argue, reveals a gap in current diagnostic frameworks that may leave many affected patients overlooked in clinical care, because their suffering is dismissed as an inevitable part of new parenthood. The study was funded by the National Heart, Lung, and Blood Institute, and the team, which spans anesthesiology, psychiatry, obstetrics, and statistics at Stanford, the University of Arkansas for Medical Sciences, and Northwestern University, argues that improved screening strategies are needed. Whether that means adding validated sleep questionnaires to routine postpartum visits, developing postpartum-specific thresholds for the PROMIS sleep measures, or training clinicians to distinguish disorder-level insomnia from normal newborn-related sleep loss, the message is clear: one in eight women at six weeks postpartum has a diagnosable sleep disorder, and almost none of them know it.

Subject of Research: Prevalence and clinical characterization of insomnia disorder at six weeks postpartum using structured diagnostic interviews

Article Title: Insomnia disorder at 6 weeks postpartum: a prospective study

Article References: Takenoshita, M., Jalali-Sohi, A., Hidajat, N. Z., Michel, G., Guo, N., Manber, R., Lyell, D. J., Barwick, F., Morris, A. M., Moody, H., Elkhateb, R., Mhyre, J., Cella, D., Shaunfield, S., Mackey, S., Tian, L., Carmichael, S. L., Panelli, D. M., Tang, X., & Sultan, P. (2026). Insomnia disorder at 6 weeks postpartum: a prospective study. Journal of Clinical Sleep Medicine, 22(1), Article 152. https://doi.org/10.1007/s44470-026-00150-3

Image Credits: AI Generated

DOI: 10.1007/s44470-026-00150-3

Keywords: insomnia disorder, postpartum, sleep disturbance, sleep-related impairment, maternal health, Bergen Insomnia Scale, PROMIS, structured clinical interview, sleep disorder screening, postpartum care, sleep deprivation, prevalence

The research team, led by Chloe Salzmann and Evan Cross of the Division of Neonatology, together with biostatisticians Ke Yan and Jian Zhang of the Division of Quantitative Health Science, set out to answer a deceptively simple question: which maternal and infant factors actually influence lactation success within the NICU, and does early lactation consultation make a measurable difference? To do so, they assembled a cohort of 862 maternal-infant dyads admitted to the NICU and examined the relationship between lactation support and discharge home receiving mother’s own milk, adjusting for a comprehensive panel of demographic and clinical covariates. Because the study was retrospective, it cannot prove causation in the way a randomized trial would, but the scale of the association and the rigor of the adjustment make the signal difficult to dismiss.

The headline finding is striking. Infants whose mothers had four to six lactation consultant visits within the first fourteen days after birth were 8.93 times more likely to be discharged home receiving mother’s own milk than infants whose mothers received less support in that window, with a 95 percent confidence interval of 4.86 to 16.40 and a P value below 0.05. In epidemiological terms, an adjusted odds ratio approaching nine is an unusually large effect for a modifiable health care intervention. It suggests that the first two weeks after delivery, a period physiologists call secretory activation, represent a critical window during which the groundwork for long-term milk production is either laid or lost.

The biology behind that window helps explain why timing matters so much. Lactogenesis, the onset of copious milk secretion, is driven by a sharp postpartum drop in progesterone combined with sustained prolactin signaling. For most mothers, secretory activation occurs within roughly seventy-two hours of delivery, but mothers of preterm infants frequently experience delayed lactogenesis II, often because of pregnancy complications such as preeclampsia, hemorrhage, or infection, as well as the absence of an infant suckling at the breast. Milk volume achieved in the first two weeks has been shown in prior work to strongly predict mother’s own milk feeding at NICU discharge, which means that early difficulties compound: a mother who misses the secretory activation window tends to have a lower baseline supply for the entire hospitalization, making it progressively harder to sustain an exclusive or predominant human milk diet as her infant grows and her nutritional demands increase.

This is precisely where professional lactation consultants enter the equation. Pumping for a hospitalized infant is a technically demanding routine, typically requiring eight or more sessions per day with well-fitted flanges, effective pump settings, and careful milk handling, all coordinated with rounds, skin-to-skin sessions, and the emotional labor of parenting a fragile newborn. Lactation consultants address pump dependence directly, troubleshooting fit and technique, reinforcing pumping frequency, setting realistic milk volume goals, and providing the psychosocial encouragement that prior research has identified as a key social factor in human milk feeding. The new study quantifies what many clinicians have long suspected: repeated, early engagement with these specialists is associated with a transformation in outcomes, not merely a marginal improvement.

The dose-response structure of the findings is as important as the magnitude. Four to six visits within fourteen days, roughly a consultation every two to three days during the hospitalization’s opening stretch, corresponded to the strongest association with discharge on mother’s own milk. The study also examined the relationship between the number of days until the first lactation consultation and outcomes, adding to a growing literature, including quality improvement work such as the ‘pump early, pump often’ initiative, indicating that the first consultation should occur as close to delivery as possible. The message for hospital administrators is concrete: NICUs need enough lactation consultant staffing to deliver intensive support in the first postpartum fortnight, not occasional or on-demand advice that arrives after the critical window has closed.

Alongside the support findings, the study exposed persistent and sobering disparities. After adjustment, infants born to mothers who were White, primiparous, partnered, covered by private insurance, and living in higher-income households were more likely to be discharged home receiving mother’s own milk. These results echo a broader body of research documenting that barriers to human milk feeding in the NICU are not evenly distributed, with neighborhood structural factors, insurance status, and social support all shaping access to lactation care. First-time mothers, despite having no prior breastfeeding experience, may have more flexibility to remain at the bedside and more intensive engagement with hospital services, while mothers juggling employment, other children, and long commutes face structural obstacles that no amount of individual motivation can fully overcome.

The equity implications are significant for both clinical practice and health policy. Access to medical lactation support remains inconsistent across institutions and payers, and advocates have argued for expanded Medicaid reimbursement for lactation counseling precisely because the mothers least likely to receive it are often those who stand to benefit most. If intensive early lactation support is associated with a nearly ninefold increase in the odds of discharge on mother’s own milk, then unequal access to that support functions as an amplifier of existing disparities in infant nutrition, with downstream consequences for infection rates, neurodevelopment, and long-term health. The authors conclude that hospitals should provide adequate access to lactation consultants to account for the demonstrated need for at least four visits within the first two postpartum weeks, effectively converting a research observation into a staffing and policy benchmark.

Several caveats frame the interpretation. As a single-center retrospective cohort, the findings reflect the practices and population of one academic NICU, and unmeasured confounding remains possible: mothers who attend four to six lactation visits may differ in ways related to intention and opportunity that adjustment cannot fully capture. The authors note that a deidentified dataset will be made available upon reasonable request, inviting replication across centers. The study was approved by the Medical College of Wisconsin Institutional Review Board with a waiver of informed consent and conducted in accordance with the Declaration of Helsinki, and the authors report no competing interests. Even with these limitations, the work lands at a moment of growing clinical consensus that human milk should be the default diet for vulnerable newborns. What this study adds is a practical, testable lever: schedule lactation consultation early, repeat it often, and make sure it reaches every mother, not only those with the resources to seek it out. For the 862 families in this cohort, and for the hundreds of thousands of NICU families each year, the first fourteen days after birth may prove to be the most consequential fortnight in an infant’s nutritional future.

Subject of Research: The effect of early, intensive lactation consultant support on mother's own milk feeding at neonatal intensive care unit discharge.

Article Title: Timing and intensity of lactation support influences NICU discharge on maternal milk

Article References: Salzmann, C., Cross, E., Yan, K., Zhang, J., Cabacungan, E., Nghiem-Rao, T. H., & Sprecher, A. (2026). Timing and intensity of lactation support influences NICU discharge on maternal milk. Journal of Perinatology. https://doi.org/10.1038/s41372-026-02895-4

Image Credits: AI Generated

DOI: 10.1038/s41372-026-02895-4

Keywords: lactation support, NICU, mother's own milk, lactation consultant, preterm infants, secretory activation, breastfeeding disparities, human milk feeding, neonatology, pumping, Journal of Perinatology, postpartum care

The study draws on interviews with leaders, clinicians, and care coordinators from six of the seventeen Medicaid ACOs operating in Massachusetts between 2018 and 2024. MassHealth, the state’s Medicaid program, launched its first ACOs under a section 1115 waiver in 2018 and renewed and expanded the program under a second five-year waiver in 2023. This makes the Massachusetts experience the first qualitative assessment of how Medicaid ACO programs implemented maternal health initiatives across multiple waiver periods. It also builds on earlier quantitative work by several of the same researchers, which linked ACO participation to improvements in maternity care engagement and quality—though not yet in hard health outcomes—with effects that varied across different ACO models.

The central finding is deceptively simple: metrics matter. During the first waiver period, ACO contracts required only a single maternal health metric—timely prenatal care. The second waiver period dramatically expanded the requirements, adding a metric for timely postpartum visits and mandating postpartum depression screening. Those contractual obligations, the researchers found, prompted organizations to adapt existing programs or build entirely new ones. Study lead and corresponding author Dr. Shannon Ogden, now a postdoctoral research fellow at the Kaiser Permanente Division of Research who conducted the work as a graduate research assistant at Boston University, explained that instituting maternal health-related metrics at the organizational level does push ACOs and healthcare organizations to develop the programs needed to meet those metrics and to track patients’ engagement. Leaders she interviewed, however, also acknowledged remaining gaps, signaling that considerable work lies ahead even in a state often viewed as a policy leader.

The mechanics of that change are instructive for policymakers elsewhere. With the support of care coordination teams, ACO leaders and clinicians reported that they were able to engage pregnant patients in prenatal care sooner, track births as they occurred, and motivate attendance at postpartum visits once the metrics were introduced. The Massachusetts policy environment reinforced these efforts: alongside the expanded contract requirements, the Commonwealth extended Medicaid coverage from sixty days to twelve months after delivery and began covering doula services, a combination that widened the window during which vulnerable patients could receive supported care.

Yet the study is equally candid about the formidable challenges that surfaced, and it finds that these varied substantially depending on the type of ACO model. Primary care-led ACOs, which are not embedded within comprehensive health systems, especially struggled to track patients’ care delivered out of network and over time. System delays in identifying pregnancies complicated efforts to reach people early in gestation, when interventions matter most. The researchers argue that these implementation barriers—rather than any inherent flaw in the ACO concept—explain much of the unevenness in results, and they offer recommendations that Massachusetts and other states can use to overcome the obstacles in maternal healthcare delivery.

Some of the most vivid findings concern the ingenuity of frontline care coordinators. Senior author Dr. Lois McCloskey, clinical professor of community health sciences at Boston University School of Public Health, described how coordinators worked around the siloed nature of medical care, doggedly following new mothers after birth to ensure they attended their postpartum visits. Many ACOs met the second waiver’s requirements by tailoring programs originally designed for patients with complex chronic illness to the needs of mothers experiencing pregnancy and postpartum complications. But McCloskey also flagged a structural blind spot: contracts did not require the same intensity of follow-up beyond the immediate postpartum period of roughly six to ten weeks after birth. That gap is clinically consequential. It is precisely in the extended postpartum period, she noted, when mothers—especially those with complications—are juggling the most and are most likely to fall through the cracks, and it is when they are most at risk for severe morbidity. In fact, about one-third of maternal deaths occur in this extended postpartum window, and many of them are preventable.

Doula care emerged as another priority of the second waiver period, and the evidence base behind it is compelling: continuous support from a trained doula has been shown to build trust between patients and the healthcare system and to improve equity in maternal care, benefits that are especially relevant for the Black and Hispanic patients who bear the brunt of maternal mortality disparities. ACOs that had already established a doula program or an effective care coordination team were able to deliver this service, but others reported difficulty hiring enough doulas within MassHealth’s network to meet demand. The workforce bottleneck illustrates a recurring theme in the study: mandates can create the will to act, but supply-side capacity determines whether that will becomes care.

The ACOs also broadened their focus during the second waiver period to address patients’ social needs—stable housing, adequate food, reliable transportation, and affordable utilities—which the Centers for Medicare and Medicaid Services and a growing body of research identify as significant drivers of maternal health. Pregnant and postpartum patients were screened for eligibility to participate in FLEX Services, MassHealth’s program allowing ACOs and other healthcare organizations to partner with community organizations to meet these needs. Care coordinators reported barriers here as well, including a lack of provider awareness of the program and burdensome application processes, though the researchers note that Massachusetts’ subsequent expansion of the FLEX program after the study period ended may have eased some of these problems. As Dr. Ogden observed, this holistic orientation inherently supports maternal health: helping patients find housing, pay for food, secure a job, or keep the electricity on can reduce the risk of poor outcomes before, during, and after pregnancy.

The study’s recommendations follow directly from its evidence. The research team urges states and healthcare systems to expand maternal healthcare performance metrics and patient tracking beyond the immediate postpartum period, and to invest in the innovations needed to strengthen care coordination and integration for pregnant and postpartum people. Sustainable change, as McCloskey emphasized, requires more than metrics; it requires sufficient, tangible resources to make change meaningful. The work was coauthored by researchers at W2 Consulting Corporation, Harvard Medical School and the Harvard Pilgrim Health Care Institute, and Boston University Chobanian and Avedisian School of Medicine, and forms part of a larger research program led by Dr. Megan Cole of Harvard Medical School, funded by a $3.8 million grant from the National Institute on Minority Health and Health Disparities. If states heed the lessons from Massachusetts, the researchers argue, strategic direction and investment of this kind could contribute meaningfully to reversing the alarming maternal morbidity and mortality rates that persist in the United States—and that continue to burden Black and brown communities most of all.

Subject of Research: How Medicaid Accountable Care Organizations implement maternal health initiatives to improve care quality and equity

Article Title: How Medicaid ACOs can lead the US towards maternal health equity

Article References: How Medicaid ACOs can lead the US towards maternal health equity. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: Medicaid ACOs, maternal health equity, MassHealth, postpartum care, prenatal care, postpartum depression screening, doula services, care coordination, social needs, The Milbank Quarterly, maternal mortality, health policy