Breastfeeding intention and practice in an urban minority population: relationship to maternal depressive symptoms and mother–infant closeness

Towards Preventative Psychiatry: Concurrent and Longitudinal Predictors of Postnatal Maternal-Infant Bonding

Maternal-infant bonding is important for children's positive development. Poor maternal-infant bonding is a risk factor for negative mother and infant outcomes. Although researchers have examined individual predictors of maternal-infant bonding, studies typically do not examine several concurrent and longitudinal predictors within the same model. This study aimed to evaluate the unique and combined predictive power of cross-sectional and longitudinal predictors of maternal-infant bonding. Participants were 372 pregnant women recruited from an Australian hospital. Data were collected from mothers at antenatal appointments (T0), following their child's birth (T1), and at a laboratory assessment when their child was 5-11-months-old (T2). Poorer bonding at T2 was predicted at T0 by younger maternal age, higher education, and higher antenatal depressive symptoms. Poorer bonding at T2 was predicted at T1 by younger maternal age, higher education, and higher postnatal depressive symptoms. Poorer bonding at T2 was predicted at T2 by younger maternal age, higher education, higher postnatal depression symptoms, higher concurrent perceived social support, and more difficult infant temperament, when controlling for child age at T2. To promote positive maternal-infant bonding, global and targeted interventions in the perinatal period may benefit from targeting maternal psychopathology, perceived lack of social support, and coping with difficult infant temperament.

The impact of antenatal depressive symptoms on exclusive breastfeeding intention: A moderating effect analysis

OBJECTIVE

Exclusive breastfeeding intention is an important predictor of exclusive breastfeeding behavior. Antenatal depressive symptoms are a potentially modifiable risk factor for exclusive breastfeeding intention. However, studies of the impact of antenatal depressive symptoms on exclusive breastfeeding intention are sparse and contradictory. Therefore, explorations that evaluate the effects of identical factors of exclusive breastfeeding intention and antenatal depressive symptoms in their relationship are urgently needed. This study aims to (1) investigate the impact of antenatal depressive symptoms on exclusive breastfeeding intention based on confounders related either to antenatal depressive symptoms and/or exclusive breastfeeding intention and (2) explore whether or not identical factors moderate the relationship between antenatal depressive symptoms and exclusive breastfeeding intention.

DESIGN AND SETTING

A cross-sectional survey was conducted at a tertiary hospital in Hunan, China.

PARTICIPANTS

A total of 393 pregnant women completed a self-administered questionnaire, a question on their breastfeeding intention, the Edinburgh Postnatal Depression Scale, and the Perceived Social Support Scale during their first-trimester hospital visit. Logistic regression was used to evaluate the impact of antenatal depressive symptoms on exclusive breastfeeding intention. Moderate analysis was employed to explore whether identical factors moderate the relationship between antenatal depressive symptoms and exclusive breastfeeding intention.

RESULTS

Antenatal depressive symptoms negatively affect the exclusive breastfeeding intention after controlling as fully as possible for confounders (adjusted OR = 2.88, 95% CI: [1.06, 7.82]) and it was moderated by one of the identical factors (i.e., social support). The results of the simple slope test showed a negative relationship between antenatal depressive symptoms and exclusive breastfeeding intention among pregnant women with low levels of social support (b =-0.011, p < 0.05).

CONCLUSION AND IMPLICATION FOR PRACTICE

Social support moderates the negative effects of depressive symptoms on exclusive breastfeeding intention. Clinical care practices and future intervention research that focus on improving antenatal depressive symptoms and exclusive breastfeeding intention should consider the moderator.

Association between postpartum depression and the practice of exclusive breastfeeding in the first three months of life

OBJECTIVE

To investigate the association between postpartum depression and the occurrence of exclusive breastfeeding.

METHOD

This is a cross-sectional study conducted in the states of the Northeast region, during the vaccination campaign in 2010. The sample consisted of 2583 mother-child pairs, with children aged from 15 days to 3 months. The Edinburgh Postnatal Depression Scale was used to screen for postpartum depression. The outcome was lack of exclusive breastfeeding, defined as the occurrence of this practice in the 24h preceding the interview. Postpartum depression was the explanatory variable of interest and the covariates were: socioeconomic and demographic conditions; maternal health care; prenatal, delivery, and postnatal care; and the child's biological factors. Multivariate logistic regression analysis was conducted to control for possible confounding factors.

RESULTS

Exclusive breastfeeding was observed in 50.8% of the infants and 11.8% of women had symptoms of postpartum depression. In the multivariate logistic regression analysis, a higher chance of exclusive breastfeeding absence was found among mothers with symptoms of postpartum depression (OR=1.67; p<0.001), among younger subjects (OR=1.89; p<0.001), those who reported receiving benefits from the Bolsa Família Program (OR=1.25; p=0.016), and those started antenatal care later during pregnancy (OR=2.14; p=0.032).

CONCLUSIONS

Postpartum depression contributed to reducing the practice of exclusive breastfeeding. Therefore, this disorder should be included in the prenatal and early postpartum support guidelines for breastfeeding, especially in low socioeconomic status women.

Breastfeeding and postpartum depression: Assessing the influence of breastfeeding intention and other risk factors

BACKGROUND

Risk and protective factors for postpartum depression have been extensively studied, and in recent studies an association between breastfeeding and maternal mood has been reported. The present retrospective, cross-sectional study was conducted to evaluate the association between breastfeeding-related variables and postpartum depression (based on Edinburgh Postnatal Depression Scale threshold criteria) within the context of other known risk factors.

METHOD

Breastfeeding information, demographic information, and scores on the Edinburgh Postnatal Depression Scale were examined from the Canadian Maternity Experience Survey. This survey contains data collected from 6421 Canadian mothers between October 2006 and January 2007, and 2848 women between five and seven months postpartum were included in the current analyses.

RESULTS

In contrast to previous research, logistic regression analyses revealed that when considered within the context of other risk factors, breastfeeding attempt and duration were not associated with postpartum depression at five to seven months postpartum. Although a relationship between the prenatal intention to combination feed and postpartum depression was observed, these variables were no longer related once other potential risk factors were controlled for. Factors that were associated with postpartum depression included lower income, higher perceived stress, lower perceived social support, no history of depression, or no recent history of abuse.

LIMITATIONS

A clinical diagnostic instrument was not used and variable selection was restricted to data collected as part of this survey.

CONCLUSION

These findings suggest that the association between breastfeeding and postpartum depression reported by previous researchers may in fact be due to alternative risk factors.

Breastfeeding and Postpartum Depression: An Overview and Methodological Recommendations for Future Research

Emerging research suggests that a relationship exists between breastfeeding and postpartum depression; however, the direction and precise nature of this relationship are not yet clear. The purpose of this paper is to provide an overview of the relationship between breastfeeding and postpartum depression as it has been examined in the empirical literature. Also, the potential mechanisms of action that have been implicated in this relationship are also explored. PubMed and PsycINFO were searched using the keywords: breastfeeding with postpartum depression, perinatal depression, postnatal depression. Results of this search showed that researchers have examined this relationship in diverse ways using diverse methodology. In particular, researchers have examined the relationships between postpartum depression and breastfeeding intention, initiation, duration, and dose. Due to a number of methodological differences among past studies we make some recommendations for future research that will better facilitate an integration of findings. Future research should (1) use standardized assessment protocols; (2) confirm diagnosis through established clinical interview when possible; (3) provide a clear operationalized definition for breastfeeding variables; (4) clearly define the postpartum period interval assessed and time frame for onset of symptoms; (5) be prospective or longitudinal in nature; and (6) take into consideration other potential risk factors identified in the empirical literature.

Differences in modifiable feeding factors by overweight status in Latino infants

PURPOSE

Obesity prevalence remains disproportionally high for young American children from low-socioeconomic and ethnic minorities. Modifiable feeding factors may lead to infant overfeeding and an increased risk for obesity. This study explored differences in modifiable feeding factors by overweight status (>85% weight-for-length) in the first year of life of Latino infants.

METHODS

Data were obtained from a cross-sectional pilot study of 62 low-income immigrant Latina mothers and their infants (ages 4-12 months). Measures included maternal feeding practices, feeding pattern, infant's 24-hour dietary recall, and maternal perception of infant weight. Chi-square and t-tests were used for comparisons between healthy weight and overweight infants.

RESULTS

Birth weight z-scores did not significantly differ by weight status. Overweight status was not associated with maternal feeding practices, feeding pattern or infant dietary intake. A trend toward significance was seen in the maternal perception of infant weight.

CONCLUSION

Overweight infants were similar to healthy weight infants in their birth weight z-scores and supports the premise that modifiable feeding factors are in play and thus targeted early feeding interventions may prove effective in decreasing obesity risk in Latinos.

Factors contributing to infant overfeeding with Hispanic mothers

OBJECTIVE

To evaluate existing evidence on factors potentially contributing to infant overfeeding among Hispanic mothers that may explain the high infant overweight rates often seen among this ethnic group.

DATA SOURCES

Electronic databases including CINHAL and MEDLINE were searched for relevant studies published from 1998 to January 2012. Related article searches and reference list searches were completed on all included studies.

STUDY SELECTION

Thirty-five studies (nine qualitative, 15 cross-sectional, nine cohort, and two longitudinal) were identified that met the following inclusion criteria: (a) studies of Hispanic-only or multiethnic mothers, (b) studies of healthy full-term infants or toddlers, (c) studies in which a majority of the sample included children within the target age group (0-24 months of age), and (d) studies conducted in the United States. The methodological quality of the studies ranged from fair to excellent.

DATA EXTRACTION

Data extraction included content related to Hispanic infant feeding and weight gain.

DATA SYNTHESIS

Reviewed research fell into three main foci of inquiry: breastfeeding and formula-feeding beliefs, attitudes, and practices; family and cultural influences of maternal feeding beliefs and practices; and maternal perceptions of infant feeding satiety and weight gain. The Preferred Reporting Items of Systematic Reviews Meta-Analysis (PRISMA) guidelines were followed for data extraction and reporting the results of this integrative review.

CONCLUSION

Three major feeding practices and beliefs among Hispanic mothers potentially contribute to infant overfeeding. Hispanic mothers are more likely to practice nonexclusive breastfeeding, initiate early introduction of solid foods including ethnic foods, and perceive chubbier infants as healthy infants. Cultural norms driving family influences and socioeconomic factors play a role in the feeding tendencies of Hispanics. Empirical research is needed to further define the primary factors that influence Hispanic mothers feeding decisions and practices that contribute to excessive weight gain in their infants.

The impact of paraprofessional home visitors on infants' growth and health at 18 months

Paraprofessional home visitors trained to improve multiple outcomes (HIV, alcohol, infant health, and malnutrition) have been shown to benefit mothers and children over 18 months in a cluster randomised controlled trial (RCT). These longitudinal analyses examine the mechanisms which influence child outcomes at 18 months post-birth in Cape Town, South Africa. The results were evaluated using structural equation modelling, specifically examining the mediating effects of prior maternal behaviours and a home visiting intervention post-birth. Twelve matched pairs of neighbourhoods were randomised within pairs to: 1) the control condition, receiving comprehensive healthcare at community primary health care clinics (n=12 neighbourhoods; n=594 pregnant women), or 2) the Philani Intervention Program, which provided home visits by trained, paraprofessional community health workers, here called Mentor Mothers, in addition to clinic care (n=12 neighbourhoods; n=644 pregnant women). Recruitment of all pregnant neighbourhood women was high (98%) with 88% reassessed at six months and 84% at 18 months. Infants' growth and diarrhoea episodes were examined at 18 months in response to the intervention condition, breastfeeding, alcohol use, social support, and low birth weight, controlling for HIV status and previous history of risk. We found that randomisation to the intervention was associated with a significantly lower number of recent diarrhoea episodes and increased rates and duration of breastfeeding. Across both the intervention and control conditions, mothers who used alcohol during pregnancy and had low birth weight infants were significantly less likely to have infants with normal growth patterns, whereas social support was associated with better growth. HIV-infection was significantly associated with poor growth and less breastfeeding. Women with more risk factors had significantly smaller social support networks. The relationships among initial and sustained maternal risk behaviours and the buffering impact of home visits and social support are demonstrated in these analyses.

Breastfeeding: an emotional instinct

OBJECTIVE

The proposed objective of this research is twofold: (1) it examines the significance of emotions to the breastfeeding experience in relation to cognition, and (2) it analyzes the extent to which emotions and cognition are connected to breastfeeding.

MATERIALS AND METHODS

An empirical research work has been carried out based on a questionnaire that was administered in a maternity hospital in the autumn of 2008, in order to gather information regarding cognitive and emotional aspects of breastfeeding behavior. The final sample comprised 311 breastfeeding mothers, and the sampling error was 5.55%.

RESULTS

The research shows that breastfeeding is not only more of an emotional reaction than a rational decision, but also demonstrates that the emotional development of breastfeeding is independent from the cognitive process.

CONCLUSIONS

A new approach in the literature of breastfeeding is put forward in which the predominant cognitive techniques and theories are complemented by highlighting the importance of understanding the target group and implementing suitable and affective actions. Specific practical implications are provided for social marketing campaigns as well as future lines of research.

The influence of culture on breast-feeding decisions by African American and white women

The purpose of this study was to examine how culture influenced breast-feeding decisions in African American and white women, using the Theory of Culture Care Diversity and Universality as a framework. One hundred eighty-six participants responded to the following: The word culture means beliefs and traditions passed down by your family and friends. How has culture affected how you plan to feed your baby? Qualitative content analysis was used to analyze the data. Four categories of responses were identified: influences of family, known benefits of breast-feeding, influences of friends, and personal choice. The findings suggest that race alone may not be as influential in infant feeding decisions as other factors. Although some women acknowledged the effect of their cultural background and experiences, most women reported that their culture did not affect their infant feeding decision. In this population, breast-feeding decisions were based on the influences of family, friends, self, and the perceived knowledge of breast-feeding benefits. Although breast-feeding statistics are commonly reported by race, cultural influences on infant feeding decisions may transcend race and include the influence of family and friends, learned information from impersonal sources, and information that is shared and observed from other people.

Predictors of breastfeeding exclusivity in a WIC sample

OBJECTIVE

To examine predictors of breastfeeding exclusivity in low-income women who received services from a Chicago area clinic of the Special Supplemental Nutrition Program for Women, Infants and Children Program (WIC).

DESIGN

A secondary data analysis of existing clinical and administrative data.

SETTING

An urban community health center serving low-income families.

PARTICIPANTS

Two hundred and thirty-five (235) low-income women who initiated breastfeeding and received WIC services.

METHODS

Logistic regression models were fit to existing prenatal and postpartum data to determine predictors of breastfeeding exclusivity during the immediate postpartum period.

RESULTS

Only 23% of the sample breastfed exclusively. Women who received first-trimester prenatal care were more likely to exclusively breastfeed than women who entered prenatal care in later trimesters (OR = 2.02, p ≤ 0.05). Women who declared intentions prenatally to exclusively breastfeed were more likely to exclusively breastfeed than women who did not intend to breastfeed (OR = 3.85, p ≤ 0.001). Overweight/obese women were less likely to exclusively breastfeed than normal/underweight women (OR = 0.50, p ≤ 0.05).

CONCLUSION

Findings from this study can be used to develop tailored interventions to promote breastfeeding exclusivity among low-income WIC recipients.

Perinatal depressive symptoms, sociodemographic correlates, and breast-feeding among Chinese women

OBJECTIVES

The objectives of the study were to (1) investigate the relationship between breast-feeding initiation and duration and patterns of perinatal depressive symptoms and (2) identify the sociodemographic correlates of such initiation and duration.

METHOD

A sample of 2365 women in their second and third trimesters and 6 weeks postdelivery was recruited via systematic sampling from 6 regional public hospitals in Hong Kong. The women were identified as having perinatal depressive symptoms, using the Edinburgh Postnatal Depression Scale. Their sociodemographic variables were investigated using the empirical evidence.

RESULTS

A total of 285 (47.66%) of the participants were found to have initiated breast-feeding, of whom 222 had breast-fed for more than 3 weeks. Logistic regression analysis revealed a monthly family income less than HK$5000 to be significantly associated with breast-feeding initiation and that housewives or part-time workers with antenatal depressive symptoms at 32 weeks of gestation were significantly more likely to breast-feed for longer duration.

CONCLUSIONS

These findings help explicate breast-feeding practices among Chinese women and indicate that effective breast-feeding promotion should consider sociodemographic correlates and perinatal depressive symptoms. The study's limitations and implications are discussed.

Breastfeeding intention among pregnant Hong Kong Chinese women

This study set out to (1) estimate the prevalence of three forms of feeding intention among 2,178 pregnant women in six of Hong Kong's regional hospitals and (2) identify the associated demographic, socioeconomic, obstetric and relational correlates. The research design was exploratory, cross-sectional, and quantitative. The Chinese version of a self-administered questionnaire was used to collect the demographic, socio-economic, and obstetric characteristics of the women. Couples' relationships were investigated using the Dyadic Adjustment Scale. All women in the second trimester of their pregnancies who attended the target antenatal clinics within the data collection period of December 2004 to December 2006 were recruited. The prevalence rates of breastfeeding, mixed feeding and artificial feeding were 53.9%, 14.8%, and 31.3%, respectively. Women who had been born in Hong Kong, lived in accommodation that was > or = 300 feet(2) (approximately 30 m(2)), had made an early antenatal booking, had a planned pregnancy, were experiencing their first pregnancy, and had a lower level of conflict with their partners were significantly more likely to opt for breastfeeding. Women who had been born in Hong Kong and already had children were significantly more likely to choose mixed feeding, compared with the artificial group in a multinomial logistic regression model. These findings suggest that effective promotion of breastfeeding during the prenatal period must target the correlates of feeding intention.

The relationship between infant-feeding outcomes and postpartum depression: a qualitative systematic review

CONTEXT

The negative health consequences of postpartum depression are well documented, as are the benefits of breastfeeding. Despite the detailed research related to these maternal and infant health outcomes, the relationship between maternal mood and breastfeeding remains equivocal.

OBJECTIVE

A qualitative systematic review was conducted to examine the relationship between postpartum depressive symptomatology and infant-feeding outcomes.

METHODS

We performed electronic searchers in Medline (1966-2007), the Cumulative Index to Nursing and Allied Health Literature (CINAHL) (1982-2007), and Embase (1980-2007) by using specific key words. A hand search of selected specialist journals and reference lists of articles obtained was then conducted. Seventy-five articles were reviewed, of which 49 specifically provided data to be extracted related to postpartum depressive symptomatology and infant-feeding outcomes. Both authors independently extracted data including study design, participants (number and characteristics), and results.

RESULTS

The results from this review suggest that women with depressive symptomatology in the early postpartum period may be at increased risk for negative infant-feeding outcomes including decreased breastfeeding duration, increased breastfeeding difficulties, and decreased levels of breastfeeding self-efficacy. There is also beginning evidence to suggest that depressed women may be less likely to initiate breastfeeding and do so exclusively.

CONCLUSIONS

Depressive symptomatology in the postpartum period negatively influences infant-feeding outcomes. These findings have important clinical implications and support the need for early identification and treatment of women with depressive symptomatology. However, strategies to address help-seeking barriers are needed if women are to receive appropriate and timely treatment. Research to determine effective interventions to support depressed breastfeeding women is warranted.

A transactional model of sleep-wake regulation in infants born preterm or low birthweight

OBJECTIVE

To test a transactional model of sleep-wake development in infants born preterm or low birthweight (PT LBW), which may inform clinical practice, interventions, and future research in this at risk population.

METHODS

One hundred and twenty-eight mother-infant dyads participated from hospital discharge to 4 months postterm. Assessments of prematurity, infant sleep-wake patterns, maternal interaction quality, depression, feeding route, and sociodemographic factors were conducted.

RESULTS

Path analyses revealed that maternal interactions directly related to infant sleep patterns and family sociodemographic risks related to less optimal parenting. In addition, bottle fed infants experienced fewer night wakings and more nighttime sleep.

CONCLUSIONS

Two potential pathways to sleep patterns in PT LBW infants were identified. The findings suggest directions for clinical work, such as supporting healthy infant sleep through parenting interventions or supporting interpersonal relations between parents and their PT LBW infants by encouraging more daytime naps. Additionally, clinicians should assess parents' nighttime sleep concerns within the larger sociodemographic and feeding context.

Screening for postpartum depression in a rural community

Postpartum depression is a serious mental health issue affecting as many as 10-15% of families during the postpartum period. The current study discusses implementation of a screening protocol for postpartum depression in a rural community health setting with a sample of 498 primarily minority women utilizing the Postpartum Depression Screening Scale. Results indicate that 22.5% of the sample population demonstrate some symptoms of postpartum depression, with Hispanic women demonstrating less symptoms than other minority groups. Results also indicate that variables such as race, feeding method and history of depression impact scale scores.

Influence of intimate partner violence during pregnancy and early postpartum depressive symptoms on breastfeeding among chinese women in Hong Kong

Numerous studies show that breastfeeding is beneficial to both mothers and babies. This study explores two understudied correlates that may influence breastfeeding initiation: intimate partner violence during pregnancy and early postnatal depressive symptoms. A cross-sectional comparative study design investigated the correlates of feeding modes of 1200 Chinese mother and infant pairs in a university-affiliated regional hospital in Hong Kong. The prevalence rates of breastfeeding and mixed feeding were 42.25% and 26.25%, respectively. Women who had no experience of intimate partner violence during pregnancy were significantly more likely to initiate breastfeeding (adjusted odds ratio = 1.84; 95% confidence interval, 1.16-2.91) after adjustment for demographic, socioeconomic, and obstetric variables. Early postnatal depressive symptoms were not significantly associated with feeding modes in a multinomial logistic regression model. Midwives are in a key position to identify and intervene to encourage more successful breastfeeding practice.

How does postpartum depression affect breastfeeding?

PURPOSE

To examine patterns of exclusive breastfeeding, combination feeding, and exclusive bottle-feeding among a sample of women identified at 2-4 weeks postpartum with positive PPD symptoms.

STUDY DESIGN AND METHODS

The sample included 122 women who were part of a larger study testing an intervention for promoting maternal-infant interaction among women with elevated PPD symptoms. Data were collected during three postpartum home visits. Demographic and feeding pattern data were described. Variables related to and predictors of feeding pattern were analyzed. The sample was compared to a random sample of postpartum women in New England.

RESULTS

Severity of depression was not significantly related to breastfeeding. Older maternal age, living with a partner, and higher income were positively related to breastfeeding. Compared to a random sample, the level of exclusive breastfeeding was significantly lower in this sample than the level of combination feeding.

CLINICAL IMPLICATIONS

Nurses should be involved in screening all prenatal and postpartum women for PPD symptoms, particularly when they present with breastfeeding difficulties, and refer for treatment when appropriate. For breastfeeding mothers, PPD treatment must include consideration of therapeutic options as well as implications for the breastfeeding relationship. When appropriate treatment for PPD is being considered, thought should be given to the importance and value of breastfeeding to the mother.

Promoting exclusive breastfeeding for Hispanic women

This article focuses on assisting nurses with the promotion of exclusive breastfeeding in Hispanic women through the understanding of their heritage, cultural traditions, and acculturation. Nurses can incorporate these traditions into daily nursing practice in order to enhance the breastfeeding experience of Hispanic mothers. Because exclusive breastfeeding is low in minority groups in the United States, it is essential that nurses use the initial postpartum period to help educate women about exclusive breastfeeding. In order to accomplish this, nurses need culturally specific information, which promotes cultural traditions and also encourages breastfeeding.

Mother-Infant Interaction, Life Events and Prenatal and Postpartum Depressive Symptoms Among Urban Minority Women in Primary Care

OBJECTIVES

Prenatal and postpartum depression are significant mental health problems that can have negative effects on mother-infant interactions. We examined the relationships among mother-infant interactions, depressive symptoms, life events, and breastfeeding of low-income urban African American and Hispanic women in primary care settings.

METHODS

Participants were 89 African American and Hispanic women who were part of a larger mental health intervention study conducted in community health centers. Questionnaire data on depression, as well as negative and positive life events, were collected during pregnancy and at three-months postpartum, while mother-infant interaction observations and breastfeeding practice were only collected at three-months postpartum.

RESULTS

The ratings of maternal behavior for 'depressed' mothers did not differ from 'nondepressed' mothers. Except for gaze aversion behavior, infants' behavior while interacting with their mothers did not differ by maternal depression level. Hierarchical regression analyses revealed that maternal positive life events positively predicted infant interactional summary ratings, while maternal negative life events were inversely associated with maternal interactional summary ratings.

CONCLUSIONS

To improve services in primary care, perinatal screenings for depression can help identify those women most at risk. When follow-up use of structured diagnostic instruments is not possible or cost-effective, clinician assessment of severity of depression will determine women with clinical levels of depression. Reducing negative life events is beyond the control of women or clinicians but cognitive interventions to help women focus on positive life events can reduce the deleterious effects of depression on mothers and their infants.