Methods
The study is an individual-level randomized controlled trial (RCT). Cisgender girls were assigned either to Girl2Girl, a text messaging-based teen pregnancy prevention program, or a “healthy lifestyle” control program. Greater detail about the intervention can be found elsewhere (Ybarra et al., Advarra Institutional Review Board, an Office of Human Research Protections (OHRP)-approved IRB, reviewed and approved the research protocol. We were granted a waiver of parental permission so that girls who wished to participate would not have to put themselves in a potentially unsafe situation by disclosing their sexual identity to their parents (Ybarra et al., 