Research on abortion and contraception often excludes transgender, nonbinary, and intersex (TNBI) people due to gender-based eligibility criteria and survey instruments that misclassify or deter their participation. These inaccurate methods result in low TNBI enrollment, biased data, and high dropout contributing to uninformed providers and poor sexual and reproductive health (SRH) outcomes. As access to abortion, contraception, and gender-affirming care becomes increasingly restricted, these challenges are likely to worsen. This proposal aims to move forward a small piece of a research project, now terminated by the NIH, that seeks to collect and analyze urgently needed data on abortion and contraception, among other SRH experiences, from a national sample of TNBI people while also testing new survey methods to improve research participation and data quality. Data collection is structured as a four-arm, parallel-design randomized controlled trial to test two novel online survey features: a gender-inclusive anatomical organ inventory for survey logic and customizable survey language. Participants are randomized to receive zero, either, or both features, while the control group will complete a survey based on a standard two-part gender identity question and traditional medical language. Both TNBI and cisgender people will be included. This study will provide actionable evidence on the contraception and abortion related needs, experiences, and preferences of TNBI people in the United States to inform the provision of more affirming and evidence-based care, as well as critical insights into how to ensure that people are being appropriately screened into care and research that is relevant for their bodies.