As many of you know, I’m not much of a fan of the Bumbo seat for most babies. I came across an excellent article by Rebecca Talmud, a pediatric PT in Park Slope this week which details many reasons to consider before using this device with your baby. Bumbo Article link
Here’s some info that may help clarify the article.
Anterior Pelvic Tilt: This baby is sitting fairly tall – his pelvis tips forward somewhat to form a base of support under his spine.
Posterior Pelvic Tilt: A newborn is unable to tilt their pelvis forward when seated, their backs are rounded, and there is not a good base of support from the pelvis. (This example is from a ridiculous stock photo found online – Don’t try this at home!) This is the positioning of the pelvis that I believe the Bumbo elicits from babies placed in the seat.