Key Social Norms Take-aways Social norms—particularly descriptive norms (what others do) and injunctive norms (what others approve)—play a more powerful role than individual attitudes in shaping adolescent wives’ fertility desires in rural Niger. The discussion highlights that pronatalist norms, reinforced through expectations about birth spacing and social sanctions for delaying pregnancy, constrain women’s reproductive autonomy and encourage conformity to high fertility ideals. Norms operate across multiple levels—individual, household (especially husbands), and community—where both perceived behaviors of others and fear of negative reactions drive higher desired family size. Importantly, the findings emphasize that social norms outweigh personal beliefs, and that shifting fertility intentions requires addressing shared expectations and power dynamics within households and communities, not just individual attitudes.

Objectives The study aimed to examine how fertility-related attitudes and social norms among adolescent wives, their husbands, and mothers-in-law are associated with adolescent wives’ fertility desires in rural Niger, including the influence of community-level normative environments.

Methods The study used cross-sectional quantitative data from 768 triads of adolescent wives (ages 15–19), their husbands, and mothers-in-law in rural Niger. Multilevel linear regression models were applied to assess associations between fertility desires and individual- and village-level attitudes and norms. Social norms were measured using items capturing descriptive norms (perceived prevalence of delaying second pregnancy) and injunctive norms (perceived social approval or disapproval), alongside attitudes toward birth spacing. Village-level aggregates of norms were also constructed to assess community-level effects.

Results Adolescent wives reported high fertility desires (mean ~8 children). Both descriptive and injunctive norms were significantly associated with higher fertility desires, particularly when wives perceived that delaying pregnancy was uncommon or socially disapproved. Wives with negative injunctive norms desired over one additional child compared to those with positive/neutral norms. Husbands’ injunctive norms were also independently associated with wives’ fertility desires, underscoring male influence. In contrast, individual attitudes toward birth spacing were not significantly associated with fertility desires. At the community level, village-level descriptive norms were significantly linked to higher fertility desires, indicating the influence of shared normative environments.

Conclusions The study concludes that fertility desires among adolescent wives in Niger are strongly shaped by multi-level social norms rather than individual attitudes. Effective interventions must address these norms at household and community levels, engage husbands and broader social networks, and promote women’s agency and reproductive rights to enable more autonomous decision-making and support reductions in high fertility.