One in Eight New Mothers Has Insomnia Disorder Six Weeks After Giving Birth

The weeks after childbirth are famously sleepless, but a new prospective study suggests that for a substantial minority of new mothers, the exhaustion goes far beyond the normal disruption of caring for a newborn. Researchers report that 13 percent of women assessed six weeks after delivery met formal diagnostic criteria for insomnia disorder, and almost none of them had ever been clinically evaluated for the condition. The findings, drawn from structured diagnostic interviews conducted at two academic hospitals in the United States, provide one of the most rigorous estimates to date of how common clinically significant insomnia is in the immediate postpartum period, and they point to a wide gap between the burden of postpartum sleep illness and the attention it receives in routine maternity care.

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