Generally ring slings are the preferred choice for younger babies, as their spine is not strong enough for them to be carried in upright carriers. (babyslingsandcarriers.com)
Unlike upright carriers the Baba Sling puts no unnatural pressure on baby's soft and undeveloped hips and spine. (babaslings.com)
Being upright as much as possible but especially after feeding helps prevent spit - up, and the movement and gentle pressure of upright carriers can help alleviate their discomfort. (thestir.cafemom.com)