Family Planning (FP) lets people control the number and timing of child-births through using contraceptives and/or restoring fertility. Nigeria has several FP policies for managing its population, yet contraceptives usage remains suboptimal despite high FP awareness, suggesting that several factors might be inhibiting FP uptake. The literature spotlights gender as factoring into FP use due to Nigeria's patriarchal society, with men positioned as gatekeepers to women's sexual/reproductive health/expression. Therefore, we investigate if/how gender is considered in Nigeria's FP policies. We thematically analysed the 'National Reproductive Health Policy', 'National Family Planning Communication Plan' and 'Nigeria Family Planning Blueprint (Scale-Up Plan)', from a critical realist viewpoint. Our analysis generated an overarching theme-'A Gendered Human Right', with three further themes: Women's Right-Women's Issue', 'Adolescent Girls-not left out' and 'Men's Right as Supporters'. FP was portrayed as the right of women, adolescents (particularly girls≥10yrs) and men. It was highly feminised, with women, not men, majorly shouldering the FP responsibility and women's FP access was presented as hindered by men. Moreover, we advance recommendations for optimising Nigeria's policies to address gender imbalances hampering women's FP access and uphold the rights of all people, women/girls especially.