Health & Wellness Halo Mon ,04 2424 9 months ago Last Updated : 10:30 AM ‘Eldest Daughter Syndrome’ and Sibling Birth Order: Does it Matter? “Eldest daughter syndrome” assumes that birth order shapes who we are and how we interact. Does it? HALO NEWSLETTER Keep reading HALO with a Free Subscription unlock this story instantly and join members and pros reading HALO daily -It's Free SIGN UP LOGIN