While childfreeness has received increasing attention in recent years, little is known about why childfree women voluntarily choose sterilisation for non-medical reasons and how this decision affects their sexuality. Elective sterilisation represents a permanent reproductive choice that combines questions of identity, freedom, and bodily autonomy with intimate and relational consequences. This study explored childfree women's motivations for undergoing elective sterilisation and examined how it shapes their experiences of sexuality and sexual relationships. Semi-structured interviews were conducted with ten self-identified childfree women aged 24-39 who underwent elective sterilisation. Data were analysed using interpretative phenomenological analysis, allowing for an in-depth exploration of individual meaning-making and shared experiential themes. Participants described sterilisation as the most reliable way to secure their decision to remain childfree. The procedure was linked with a sense of relief, freedom, and the removal of ongoing fears about unwanted pregnancy. These changes brought greater psychological ease and allowed intimacy to feel more spontaneous and less burdened by anxiety. While physical aspects of sex remained unchanged, participants reported improvements in the quality of their sexual life and partner relationships due to reduced stress. Social responses, ranging from support to stigma, and the availability of clear medical information played an important role in how confident women felt about their choice. For childfree women, sterilisation was experienced as more than a contraceptive decision. It confirmed their reproductive autonomy, strengthened their sense of identity, and shaped their experience of sexuality and intimacy. These findings highlight the need for respectful counselling, reliable medical information, and broader recognition of diverse reproductive paths. This study also contributes to international debates on reproductive autonomy, offering insights into the intersection of gender equality, healthcare practices, and sexual well-being. This research was funded by MUNI/A/1673/2024 Factors of successful psychological and social functioning in a changing world (WELLBE).