Why 90% of us are right-handed

More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Just 10 weeks after conception, most fetuses move their right arm more than their left. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy . Are you right-handed or left-handed? The answer for most of us is right. That's because nearly 90 percent of all people are right-dominant.