“…Future research should expand testing of these tools in low-income countries and other contexts, where they may be hard to use in their current form. Several studies suggest that background characteristics, such as race, ethnicity, age, geographic location, sexual orientation, pregnancy norms, and pregnancy history, affect the acceptance and effectiveness of these family planning tools [ 5 , 31 , 35 , 40 ]. Hence, tailoring the content of the tools to the specific cultural context may increase their effectiveness.…”