Temporary Childbirth Migration (TCM), where women return to their natal homes during or after pregnancy, is a common but understudied practice in India and South Asia. This study examines the influence of social support systems on TCM decisions among Indian women, focusing on the roles of husbands, in-laws, and parents. The study was conducted in the Vadu Health and Demographic Surveillance System (HDSS) in Western Maharashtra, India, and involved 41 in-depth interviews with triads comprising women, their husbands, and mothers-in-law. Participants varied in age, education, occupation, marriage, migration type, and delivery method and included women with infants up to two years old. Data were analysed using rapid and traditional coding approaches with predefined and emergent codes. Findings were categorised under four key domains of social support: emotional, financial, instrumental, and informational. Emotional support from mothers fosters a stress-free environment; financial support from family influences location; instrumental support for household tasks differs across settings; and informational guidance from experienced family members guides expectant mothers. Healthcare access, household status, and the husband’s role also shape migration choices. Women prioritise proximity to medical facilities, comfort, and freedom in their natal homes. Decisions are typically inclusive, involving multiple family members. The study shows that social support, cultural norms, and practical needs influence TCM decisions, and further research is needed to support women’s choices during the perinatal period. In conclusion, recognising emotional, financial, informational, and instrumental support can help providers and policymakers improve maternal and child health outcomes.

In high-income countries, fertility is increasingly postponed into ages when fecundity declines, elevating the risk of unmet reproductive goals. In this context, how individuals perceive their own and their partner’s reproductive potential may carry important implications for well-being and relationship stability, long before clinical infertility is diagnosed. Drawing on 13 waves of longitudinal data from the German Family Panel (pairfam), this study uses individual fixed-effects models to examine how within-person changes in perceived fecundity – both one’s own and one’s partner’s – are related to life satisfaction, relationship satisfaction, and union dissolution. By capturing both individual and partner assessments, this approach emphasizes the couple as the key unit of reproductive experience. Declines in both own and partner’s perceived fecundity are associated with lower life and relationship satisfaction. However, perceptions of a partner’s fecundity exert a stronger influence on relationship outcomes than self-perceptions. In particular, decreases in partner-perceived fecundity increase the risk of separation, a pattern not observed for changes in one’s own fecundity. These associations do not vary significantly by gender but are moderated by parental status and age, with effects being weaker among parents and older individuals. By integrating both self- and partner assessments of fecundity, this study advances a dyadic, life course perspective on fertility. It shows that subjective reproductive potential functions as a relational stressor with meaningful consequences for emotional well-being and relationship trajectories.

The term ‘childfree’ differs from ‘childless’ not only as a distinction between a deliberate choice and a condition caused by circumstances, but it also indicates the ongoing efforts of childfree couples to prevent conception through contraception. The choice to remain childfree develops gradually, and for many, it is not decided at the outset. Thus, questions arise about the contraceptives that couples prefer and whether these preferences change as their decision to stay childfree becomes more certain. To explore this, a thematic analysis was conducted following joint interviews with thirty-six heterosexual childfree couples, eighteen each from India and Canada, to identify patterns in their experiences with choosing diverse modes of contraception. Distinctive birth control strategies emerged in the accounts of childfree couples from Canada and India. Among Canadian participants, it was discovered that they utilised a variety of contraceptives at different stages of their relationship, whereas most Indian participants preferred and relied on the male barrier method. The differences in the preferred methods of contraception, as well as the actually used contraception, highlighted the significance of how individual characteristics such as education, occupation, and income interact with cultural and institutional influence.

The notion of ‘urban exposome’ brings promise to the public health and epidemiology fields of inquiry, particularly within research projects conducted within birth cohorts. However, it is also challenging. The present paper addresses how combining qualitative methods with numerical data on exposures and health outcomes may help to fulfil that promise while posing important challenges to researchers. Quantitative methods based on Geographic Information System and other geo-technologies establish the linkage between participants’ residential locations and geospatial datasets, generating many quantitative measurements of environmental exposures throughout participants’ life course since birth. Yet, abstracted quantitative measurements alone do not capture lived experiences and do not allow for a rich inquiry about the complex and situated webs of social, physical, and biological phenomena that shape their bodies. Qualitative approaches may enhance quantitative data collected from sensors, blood samples, and physical examinations. These methods help to uncover, with depth and nuance, how individuals build meaning, navigate their surroundings, and how their complex contexts shape their lives and health, strengthening epidemiological evidence. In other words, they may help produce more data points and provide context, thus improving the interpretation of quantitative measurements. Besides, some of these methods promote reflection, collective discussion, and community empowerment. By integrating quantitative and qualitative approaches, researchers can obtain a more holistic and contextualised understanding of the external urban exposome. Multi-methods and mixed-methods approaches may strengthen the validity of findings, improve the interpretability of results, generate new hypotheses, and support the development of place-based interventions. Nevertheless, integrating quantitative and qualitative approaches may raise several challenges related to epistemological and ontological tensions, different scientific practices, ethical compliance, and the training of research teams. Concluding, the combined use of quantitative and qualitative methods in measuring the external urban exposome within cohort studies offers a powerful approach to understanding the complex interplay between urban environments and health outcomes.

Food insecurity (FI), defined as unreliable access to sufficient, safe, and nutritious food, affects nearly 10 million people in the UK. However, official statistics often exclude individuals relying on informal or non-referral-based food support, rendering their experiences largely invisible. This study explores how users and volunteers experience and interpret FI in charity-run, community-based food aid settings across England, an area under-represented in UK studies which are dominated by formal, referral-based food bank models. This qualitative study employed a hermeneutic phenomenological approach to understand the lived experiences of FI. Nineteen semi-structured interviews were conducted with a purposive sample of food bank users (n = 10) and volunteers (n = 9). Interviews were transcribed verbatim and analysed using reflexive thematic analysis (TA). The socio-ecological model (SEM) was used to structure analysis across five levels: individual, interpersonal, institutional, community, and policy levels. Five interconnected themes emerged across the socio-ecological model: (1) Individual: Mental Health, Stigma and Shame; (2) Interpersonal: Caregiving Responsibilities and Sacrifice; (3) Institutional: Chronic Food Aid Reliance and Nutritional Constraints; (4) Community: Informal Networks and Support; and (5) Public Policy: Welfare Inadequacy and Political Neglect. Volunteers also played a mediating role between systems and individuals, navigating logistical burdens and emotional labour. The findings highlight the multidimensional and structured nature of FI in the UK and offer new insights into how dignity, autonomy, and nutritional adequacy are negotiated within informal food support systems. The study calls for more sustainable, community-responsive food aid models and structural policy reforms addressing poverty, inequality, and the legal right to food.

Biosocial birth cohort studies are uniquely positioned to be novel sites of interdisciplinary research. Their enduring commitment to specific field sites and populations, recurring grant renewal cycles, ability to ask prospective questions while drawing on long-standing data repositories, and more ensure ongoing collaboration and allow research to remain responsive to the evolving needs and timelines of multiple disciplines. However, it is widely recognised that interdisciplinary work is often easier imagined than achieved, and additional conditions are required to facilitate it beyond assembling teams of varied experts. This piece offers mediating practices as a concept that refers to the practical, multi-directional, and relational processes that attempt to resolve tensions that interdisciplinary teams often confront. Mediating practices bridge gaps among different disciplines’ data and methods, often relying on pragmatic strategies, like re-designing data infrastructures or planning action items after a meeting, to do so. As such, mediating practices are crucial to conducting successful interdisciplinary research. Further, the concept of mediating practices foregrounds the actions of junior team members who often perform these practices, highlighting the need to foster epistemic humility and models of horizontal knowledge production in interdisciplinary teams. Here, the authors discuss their experiences and insights as members of interdisciplinary projects and outline how mediating practices emerged in these projects and enabled interdisciplinary success.

Air pollution exposure and its health effects are a central concern of environmental epigenetic research with birth cohorts. This article explores why researchers have turned to the placenta as a research object to study the dynamic interactions between in utero exposure to air pollution and future child health. Drawing on Science and Technology Studies, particularly the bio-object concept, this article analyses the transformation of the placenta into a technologically manipulated postgenomic bio-object through scientific discourse and practice. Building on ethnographic fieldwork conducted at an institute of epidemiology and public health in Spain, we analyse how researchers deal with the tension between the placenta’s promises for epigenetic research and the practical research realities in postgenomic sciences. First, researchers discursively call upon the placenta as a suitable research object that embodies air pollution exposure and becomes entangled with and responds to this exposure via epigenetic changes. Studying the placenta promises to elucidate the temporally dynamic and environmentally embedded process of disease development as one of postgenomics’ core epistemic concerns. Second, in practice, however, accessing and preparing the postpartum placenta for epigenetic analysis defies its promise as a postgenomic bio-object. The constraints of research with birth cohorts, such as only having access to the postpartum placenta at birth, limit what researchers can know about the dynamic process of disease development. Third, we show how researchers deal with these limitations by assembling additional data in and around this organ to recontextualise the epigenetic analysis performed in the postpartum placenta and revive its postgenomic character. We conclude by discussing how ethnographies of epistemic practices provide entry points to collaboratively reflect upon the theoretical and methodological opportunities and challenges in birth cohort research to study biosocial dynamics. We suggest avenues for using qualitative social science perspectives for future biosocial research and collaboration between the social and life sciences.

Longitudinal birth cohort research provides a glimpse into the biological and social trajectories of a cohort of people, which helps us to better understand how to improve health and social outcomes. While qualitative longitudinal, ethnographic, and other qualitative research methods are increasingly used to capture complex data in trials and cohort research, they are relatively less common, and they vary greatly within and across cohorts and national contexts. The aim of this scoping review is to provide an overview of the use of qualitative and innovative methods in longitudinal preconception and birth cohort studies. Innovative methods, defined by Mannell and Davis (2019), go beyond standard surveys, interviews, and focus groups. The review summarises the literature of the integration of qualitative methods into birth cohort methodologies. Five databases were searched systematically, using MeSH and free text terms, for articles published in English before October 2022. Two-thirds of titles, abstracts, and full-text papers were screened by independent reviewers. Data extraction followed the Centre for Reviews and Dissemination guidelines and was based on features of qualitative methods from the COREQ checklist. 43 papers were included from the 13909 papers identified from the database search. The majority of the birth cohort studies used ‘traditional qualitative methods’ such as focus groups and one-to-one interviews. The studies that used ‘innovative qualitative methods’ included participatory interviews with photovoice, photographs, and using scenario and story cards, and while not a steadfast requirement of innovation, often included coproduction between the researchers and the participants. Although the literature reports challenges in conducting innovative methods within birth studies such as time and power imbalances between researcher and participant, these methods can help us better understand how to improve social and health outcomes.

Birth cohort studies provide invaluable data on topics across the lifecourse, including health, education, socioeconomic conditions, and well-being. As a result, they are an important resource for biosocial researchers to answer numerous complex research questions. However, despite being positioned as representative of their national or regional context, cohort studies often fail to capture the experience of marginalised groups.

One such group is sexual and gender minority (or LGBTQ+) people who, until very recently, have been largely invisible in birth cohorts. This is despite huge social and attitudinal changes in the last fifty years and clear evidence of the social, political, economic, and health and well-being disparities experienced compared to heterosexual cisgender people. However, due to small numbers, opportunities for quantitative analysis are limited and result in the neglect of LGBTQ+ data even when it is captured.

This article presents a brief overview of how queer lives have (and have not) been captured by standard data collection and analysis techniques in the British birth cohort studies. Then, using a cohort born in 1970, the authors explore the possibilities of person-centred mixed-method pen portraits to improve understanding of this group’s life trajectories.

In recent years, there have been increasing calls for the development and growth of the biosocial as a paradigm through which to tackle complex problems. The use of birth cohorts, mixed methods frameworks, and interdisciplinary work are common in biosocial research. However, these practices are also theoretically and practically complex due to epistemic, methodological, and academic challenges – particularly for early career researchers (ECRs) who face time constraints, funding limitations, and disciplinary expectations.

This paper draws on lessons from the experiences of ECRs in biosocial research by reflecting on theoretical heterogeneity, the necessity of translation and negotiation across disciplines and methodologies, and the practicalities of funding, collaboration, and dissemination. Throughout, the paper discusses strategies to overcome common challenges and provide suggestions for fellow ECRs and those interested in biosocial ECR training and development. The paper highlights the importance of strong networks with senior biosocial researchers and peers, the value of practical support, and the importance of formal and informal learning opportunities. The authors call for the enthusiasm for biosocial research to be matched with investment in the development and support for ECRs.