A Quantile Regression Analysis of Factors Associated with First-Time Maternal Fatigue in Korea

The aim of this cross-sectional study was to identify the factors associated with different percentiles of first-time maternal fatigue. A total of 123 first-time healthy mothers aged 18 years or older participated through an online survey. The fatigue was measured by the Korean version of the fatigue severity scale. Main variables were constructed based on the integrated fatigue model, which included mothers’ sleep quality, parenting stress, the amount of free time mothers have, the number of the child’s night wakings, general characteristics including socioeconomic status, and working status. Quantile regression was used to analyze the associated factors according to the fatigue level of first-time mothers with a young child. The mean age of the mothers and children were 32.11 years and 20.81 months, respectively. Mean fatigue score was 6.16 among the 75% quantile with high fatigue score. Lack of adequate free time in mothers, advanced maternal age, being a housewife, having a moderate income, and frequent night wakings of their child significantly increased fatigue among mothers in the third quantile of fatigue. To reduce fatigue, healthcare providers should focus on exploring ways to reduce maternal sleep disturbance and improve maternal sleep quality.

How do maternal emotion and sleep conditions affect infant sleep: a prospective cohort study

Background: Recent studies suggest that the incidence of infant sleep disorder is related to maternal emotional and sleep conditions, but how they influence each other is not fully understood. Methods: A total of 513 pairs of parents and infants were enrolled in this prospective cohort study. Maternal emotional and sleep conditions were assessed using a self-rating depression scale, self-rating anxiety scale, and Pittsburgh Sleep Quality Index at the third trimester and within 3 months after delivery. Infant sleep was assessed by the Brief Screening Questionnaire for Infant Sleep Problems within 3 months after birth. Expression of the glucocorticoid receptor (GR), melatonin receptors (MR), exchange proteins directly activated by cAMP (EPAC) receptors, and dopamine receptor (DR) in the placenta was detected by immunohistochemistry. Methylation of the promoter regions for the GR (NR3C1 and NR3C2), MR (MTNR1A and MTNR1B), EPAC (RASGRF1 and RASGRF2), and DR (DRD1 and DRD2) genes was assessed by next generation sequencing-based bisulfite sequencing PCR. Results: The incidence of sleep disorders in infants 0-3 months of age in this cohort was 40.5%. Risk factors for infant sleep disorder were low education level of the father, maternal postpartum depression, postpartum anxiety, postpartum sleep disorder, and maternal sleep disorder extend from the third trimester to postpartum. There was no difference in expression of placental DR, GR, MR, and EPAC between mothers whose infants were with and without sleep disorders. Methylation of MTNR1B was higher and expression of MR was lower in the placenta of mothers with sleep disorder in the third trimester than in mothers without sleep disorder. Level of NR3C2 methylation was lower and GR expression was higher in the placenta of mothers with sleep disorder extend from the third trimester to postpartum than in mothers without sleep disorder. Conclusion: Maternal sleep disorders in the third trimester could lead to decreased expression of MR by up-regulating MTNR1B methylation, and then resulting in elevated cortisol levels and increased GR expression by down-regulating NR3C2 methylation, which could increase the incidence of maternal postpartum sleep disorders, finally, the maternal postpartum sleep disorder could result in the high incidence of infant sleep disorder.

The Mother–Offspring Conflict: The Association Between Maternal Sleep, Postpartum Depression, and Interbirth Interval Length

To test the hypothesis that infant night waking is an adaptation to increase interbirth intervals (IBIs) (i.e., the time between a mother’s consecutive births) by exhausting the mother, we made an initial attempt at investigating whether maternal sleep disturbance is associated with longer IBIs. We also explored whether postpartum depression symptoms mediated the association between maternal sleep disturbance and IBI length. We used retrospective self-reports from 729 mothers living in Finland. We conducted structural regressions separately for the mother’s two first children at two different age intervals (0–1 and 1–3 years). Infant night waking was associated with maternal sleep disturbance (β = .78–.84) and maternal sleep disturbance was associated with postpartum depression symptoms (β = .69–.81). Postpartum depression symptoms were also associated with longer IBIs for the first child (β = .23–.28). This result supports the notion that postpartum depression in and of itself could be viewed as adaptive for the offspring’s fitness, and not just as an unintentional byproduct of the mother’s sleep disturbance. Contrary to our prediction, maternal sleep disturbance was, however, associated with shorter IBIs for the first child (β = −.22 to −.30) when including postpartum depression symptoms in the model. We discuss the potential role of social support as an explanation for this unexpected result.

Mad, Sad, or Sleepy? Relationships between Postpartum Maternal Anger, Depression, and Sleep: A Cross-Sectional Survey Study

Background: Although some women experience anger as a mood problem after childbirth, postpartum anger has been neglected by researchers. Poor maternal and infant sleep quality during the postpartum period has been associated with depressive symptoms; however, links between sleep quality and postpartum anger are unclear. This study aimed to determine the proportions of women with significant anger, depressive symptoms, and comorbid anger and depressive symptoms, and to examine maternal and infant sleep quality as correlates of postpartum anger. Methods: This cross-sectional survey study was advertised as an examination of mothers’ and babies’ sleep. Women, with healthy infants between 6 and 12 months of age, were recruited using social media. The survey contained validated measures of maternal and infant sleep quality, and maternal fatigue, social support, anger, depressive symptoms, and cognitions about infant sleep. Results: 278 women participated in the study. Thirty-one percent of women (n = 85) reported high anger levels (≥ 90th percentile on State Anger Scale) while 26% (n = 73) of mothers indicated probable depression (>12 on Edinburgh Postnatal Depression Scale). Women reported a mean of 6.2 hours of sleep (SD = 1.2 hours, range = 4 – 9 hours); over half of the participants rated their sleep as poor (n = 144, 51.8 %). Using robust regression analysis, income (b = -0.74, p < 0.05), parity (b = 2.05, p < 0.01), depressive symptoms (b = 0.59, p < 0.01), maternal sleep quality (b = 0.98, p < 0.05), and maternal anger about infant sleep (b = 0.50, p < 0.01) were significant predictors of maternal anger. Conclusions: Maternal sleep quality and anger about infant sleep are associated with maternal state anger. Clinicians should educate families about sleep pattern changes during the perinatal time frame and assess women’s mood and perceptions of maternal and infant sleep quality in the first postpartum year. They can also offer evidence-based strategies for improving parent-infant sleep. Such health promotion initiatives could reduce maternal anger and support healthy maternal-infant sleep.

PRENATAL MATERNAL SLEEP

Pregnancy affects women's sleep in many ways. Physical and emotional difficulties, especially towards the end of pregnancy, can lead to sleep disorders. Several studies suggest associations between sleep quality and high blood pressure, diabetes and depression. Sleep deprivation affect both mother and fetus. Sleep disorders are associated with low birth weight, intrauterine growth restriction, premature birth and cesarean births. This paper is a review based on information from the literature. The analysis was limited to articles and guidelines in English published between January 1, 2000 and May 1, 2020 on PubMed, ScienceDirect and Google Scholar using the following keywords: sleep, pregnancy, depression, anxiety, mental health, sleep disorders, pregnant women, interventions, treatment. In this review, we discuss the characteristics of prenatal maternal sleep, hormonal changes during pregnancy and their effects on sleep, the effects of changing sleep patterns on the pregnant woman, and the interventions needed to optimize sleep quality. According to the literature, sleep disorders are significant risk factors for mood disorders. Knowing sleep changes and their effects is useful for informing mothers. Consideration of non-pharmacological treatments and interventions such as cognitive-behavioral therapy, mindfulness therapy and relaxation exercises can be effective in optimizing the quality of sleep in pregnant women.

Association of maternal sleep before and during pregnancy with sleep and developmental problems in 1-year-old infants

This study investigated the association of maternal sleep before and during pregnancy with sleeping and developmental problems in 1-year-old infants. We used data from the Japan Environment and Children’s Study, which registered 103,062 pregnancies between 2011 and 2014. Participants were asked about their sleep habits prior to and during pregnancy. Follow-up assessments were conducted to evaluate the sleep habits and developmental progress of their children at the age of 1 year. Development during infancy was evaluated using the Ages and Stages Questionnaire (ASQ). Maternal short sleep and late bedtime before and during pregnancy increased occurrence of offspring’s sleeping disturbances. For example, infants whose mothers slept for less than 6 h prior to pregnancy tended to be awake for more than 1 h (risk ratio [RR] = 1.49, 95% confidence interval [CI] 1.34–1.66), sleep less than 8 h during the night (RR = 1.60, 95% CI 1.44–1.79), and fall asleep at 22:00 or later (RR = 1.33, 95% CI 1.26–1.40). Only subjective assessments of maternal sleep quality during pregnancy, such as very deep sleep and feeling very good when waking up, were inversely associated with abnormal ASQ scores in 1-year-old infants.

142 Prenatal Sleep Quality and Infant Sleep: A Longitudinal Study

Introduction Poor sleep quality is common during pregnancy and can increase the risk of adverse obstetric and fetal outcomes. Existing research on the association between prenatal sleep and infant sleep is scarce and has focused on other aspects of prenatal sleep such as sleep duration, chronotype, and insomnia symptoms. To our knowledge, no studies have examined the association between prenatal sleep quality and infant sleep outcomes. Thus, this study aimed to investigate whether maternal sleep quality during pregnancy was prospectively associated with infant sleep dimensions, independent of relevant covariates. Methods Participants were a subset of 272 mother-infant dyads enrolled in an ongoing cohort study. Maternal prenatal sleep quality was assessed with the Pittsburgh Sleep Quality Index (PSQI) in early to mid- (M gestational age = 15.12 ± 3.56 weeks) and late- (M gestational age = 32.44 ± 0.99 weeks) pregnancy. Mothers completed the Brief Infant Sleep Questionnaire (BISQ) at 3, 6, and 12 months postpartum. The following infant sleep parameters were assessed: sleep duration (day, night, 24-hour), number of night awakenings, and wake after sleep onset. Prenatal depressive symptoms were assessed with the Edinburgh Postnatal Depression Scale (EPDS) at both pregnancy time points. Other covariates included maternal age at enrollment, infant age, parity, and co-sleeping status. Results Generalized estimating equations (GEE) models revealed that poorer maternal sleep quality during early-to-mid pregnancy did not significantly predict infant sleep parameters after adjustment for covariates (p &gt; .05). However, in late pregnancy, poorer maternal sleep quality significantly predicted shorter 24-hour sleep duration and longer wake after sleep onset, but not daytime sleep duration, nighttime sleep duration, and number of night awakenings (p &lt; .05). Conclusion Study findings advance our understanding of the prospective link between maternal prenatal sleep quality and infant sleep. Results indicate that maternal sleep quality during late gestation may play a role in the development of infant sleep patterns. These findings have important implications for intervention efforts targeting maternal sleep quality during pregnancy. Future research should use objective measures of sleep, such as actigraphy, to better elucidate the effects of prenatal sleep quality on infant sleep outcomes. Support (if any) The Canadian Institutes of Health Research (CIHR)