The Science of Parental Bonding: How Relationships Develop After Birth

By Birth & Baby University · Last updated: October 2026 · 8 min read

Bonding is one of the most emotionally loaded words in the newborn period. Parents who do not feel an instant rush of love at birth worry that something is wrong with them or their baby, and cultural myths about a “critical window” in the first hours add to the pressure. Postpartum doulas hear these worries, often late at night and often from parents who are exhausted, in pain or recovering from a difficult birth. The research on parent-infant bonding is more nuanced than the slogans: bonding is measured with questionnaires, it develops over time, it is associated with many factors including mental health, birth experience and feeding difficulties, and difficulties are common and often improve. This article summarizes recent studies and reviews, notes how limited much of the evidence is, and describes how a doula can support bonding without turning it into a test.

Key takeaways

Quick answer: bonding is a gradual process, not a single moment, and many parents take time to feel close to a new baby. Difficulties are associated with postpartum depression, birth trauma and breastfeeding problems, but the associations are often modest and come from cross-sectional studies. Paternal bonding matters too. A doula can support closeness through ordinary caregiving and should refer persistent distress to the parent’s clinician.

• A scoping review of 79 studies of early relational health from conception to age 3 found associations with patterns of brain activation that may reflect more positive emotions and reduced risk of psychopathology, but few studies examined longitudinal change and even fewer looked beyond the mother-infant bond.
• In a cross-sectional study of 399 mothers in Ghana, screening positive for depressive symptoms was associated with a small 3% reduction in bonding scores (adjusted mean ratio 0.97), which the authors describe as modest, and interviews suggested bonding was sustained through caregiving, social support and cultural expectations.
• In a Turkish study of 257 mothers at 3 months, 12.8% met criteria for bonding difficulties on the Postpartum Bonding Questionnaire, and breastfeeding difficulties were independently associated with bonding impairment (adjusted odds ratio 3.5), while feeding mode (exclusive breastfeeding versus formula) was not.
• A systematic review of six studies on nonpharmacological interventions for women after birth trauma found that bonding and trauma symptoms improved over time in both intervention and control groups, with limited evidence for any specific intervention.

What the research says

What “bonding” research measures. Zhang and colleagues’ 2026 scoping review of early relational health (the formation of secure parent-child bonds) examined 79 studies of the link between relational health from conception to age 3 and brain structure, function and connectivity. It found associations between early relational health and brain activation patterns that may reflect more positive emotions and reduced risk of psychopathology, but noted that few studies followed brain changes longitudinally, even fewer examined relationships beyond the mother-infant bond, and that the evidence on how relational health “gets under the skin” remains unclear. In plain terms: it is widely believed that secure early relationships matter, and brain studies are consistent with that, but the mechanisms are not settled, and the studies mostly describe associations.

Mental health and bonding. Tornyevah and colleagues’ 2026 mixed-methods study surveyed 399 mothers within 12 months postpartum at three health facilities in Ghana using the Patient Health Questionnaire-9 and the Pre- and Postnatal Bonding Scale, with interviews of 31 mothers. Twenty-nine percent screened positive for depressive symptoms. After adjustment, a positive screen was associated with a 3% reduction in bonding (adjusted mean ratio 0.97, 95% confidence interval 0.95 to 0.99), which the authors call modest and say should be interpreted with caution. Mothers in both groups described bonding as sustained by maternal instinct, caregiving, social support and religious, cultural and societal expectations. The authors suggest culturally sensitive support and stronger social networks may help mothers maintain bonds. This is cross-sectional, so it cannot show direction of effect.

Feeding difficulties and bonding. Gunes and colleagues’ 2026 cross-sectional study of 257 mothers of 3-month-olds in Turkey used a Postpartum Bonding Questionnaire score above 25 to define bonding difficulty; 12.8% met it and 56.0% reported at least one breastfeeding problem. Breastfeeding difficulties were more common among mothers with bonding difficulties (81.8% versus 52.2%) and were independently associated with bonding impairment (adjusted odds ratio 3.5, 95% confidence interval 1.5 to 8.0). Higher education and having a female infant were also independent predictors, and feeding mode, exclusive breastfeeding versus formula, did not differ significantly (P = 0.64). So the sample suggests struggling to feed matters more than the way a baby is fed. The study does not show whether feeding difficulty affects bonding or bonding difficulty affects feeding, and a Turkish sample may not generalize.

Fathers and partners. Nishigori and colleagues’ 2026 adjunct study to the Japan Environment and Children’s Study analyzed 646 father-child pairs. Fathers’ bonding scores of 5 or higher on a mother-to-infant bonding scale at one month postpartum were associated with delays at age 4 in communication, problem-solving and personal-social domains on the Ages and Stages Questionnaire (adjusted odds ratios 2.8 to 3.1), and paternal depression scores of 8 or higher with fine motor and problem-solving delays. The authors conclude that paternal bonding failure and depression at one month are associated with neurodevelopmental delays in 4-year-olds, with different patterns. This is an observational association with questionnaire-based measures and does not prove that fathers’ early feelings cause later delays.

After a hard birth. Odgers and colleagues’ 2026 systematic review of nonpharmacological interventions for women after birth trauma, who may have difficulty bonding, found six studies, none of which tested occupation-based interventions. Both mother-infant bonding and trauma symptoms improved over time across intervention and control groups, and evidence was limited to support any specific intervention. The practical point is that improvement over time was common even without a specific program, but that is not a reason to dismiss a parent’s distress.

What this means for doulas

• Normalize a slow start. Many parents feel love gradually. The studies show bonding varies and often improves, and nothing reviewed here supports a make-or-break window in the first hours.
• Look at the whole picture. Depressive symptoms, a traumatic birth and feeding struggles are associated with lower bonding scores, so addressing pain, feeding support and mental health is part of supporting closeness.
• Include partners. Paternal bonding and depression were associated with later child outcomes in one cohort, which supports involving fathers and partners in caregiving and checking in on them.
• Do not diagnose. Questionnaires like the Postpartum Bonding Questionnaire are screening tools used by clinicians. A doula can listen, normalize and refer.
• Refer persistent distress. A parent who feels numb, detached, frightened of the baby, hopeless or cannot function should speak to their clinician. See Baby Blues Versus Postpartum Depression: What Every Doula Should Know.

Putting the evidence into practice

1. Ask about feelings, not just tasks. “How are you feeling about getting to know the baby?” opens the conversation.
2. Offer ordinary closeness. Skin-to-skin contact, talking, feeding with attention and responding to cues (see Supporting Healthy Newborn Development Through Responsive Caregiving). Early skin-to-skin contact is supported for breastfeeding in a Cochrane review (Moore and colleagues, 2016), though that review studied feeding outcomes, not bonding.
3. Treat feeding pain as part of the picture. Connect parents with lactation or pediatric support early.
4. Check on the parent’s rest and mood. Exhaustion and low mood make closeness harder.
5. Refer. If distress is persistent or severe, encourage a call to the parent’s clinician now.

Limits and uncertainty

Most recent studies are cross-sectional, in single countries, with self-reported questionnaires whose cutoffs and meanings differ. The scoping review covered brain imaging studies with little longitudinal data. The father study is a questionnaire-based cohort with modest numbers. This article draws on abstracts, not full texts, and did not review classic attachment research, trials of skin-to-skin contact on bonding, or interventions to improve bonding in clinical populations. “Bonding” and “attachment” are different constructs, and the sources use them differently. Culture shapes expectations about closeness and expression of feelings.

The bottom line

Parent-infant bonding is a gradual, variable process shaped by mental health, birth experience, feeding and support, and measured mostly by questionnaires. Difficulties are common, often improve and are not a verdict on a parent. A doula supports closeness through ordinary care, includes partners, looks after the parent’s own wellbeing and refers persistent distress to a clinician.

Birth & Baby University’s For Doulas page outlines its postpartum doula training, recertification and mentorship for doulas who support families as they get to know their babies. Confirm that any program meets your certifier’s, employer’s or state’s requirements before you enroll.

This article is for professional education. It is not medical, legal or tax advice. Check the standards of your certifying organization and the rules where you work. For concerns about a baby’s health, contact a pediatric provider or emergency services.

Sources and further reading

• Zhang L, et al. Early relational health and its impact on the developing brain: a scoping review. Clinical Child and Family Psychology Review (2026). Read the source
• Tornyevah L, et al. Postpartum depressive symptoms and mother-infant bonding: a mixed-methods study among postpartum women in Ghana. Nursing Research and Practice (2026). Read the source
• Gunes B, et al. Breastfeeding difficulties and maternal-infant bonding at three months postpartum in a Turkish cohort. Frontiers in Pediatrics (2026). Read the source
• Nishigori H, et al. Paternal bonding failure and depression at 1 month postpartum are associated with neurodevelopmental delay in 4-year-old children. Infant Mental Health Journal (2026). Read the source
• Odgers S, et al. A systematic review of nonpharmacological interventions to improve trauma symptoms and mother-infant bonding for women who experience birth trauma. Australian Occupational Therapy Journal (2026). Read the source
• Moore ER, et al. Early skin-to-skin contact for mothers and their healthy newborn infants. Cochrane Database of Systematic Reviews (2016). Read the source

More for professionals: the Professionals Blog.