Do babies prefer inward or outward facing baby carriers?

Hipseats are not ergonomic carriers and should not be used as it adds strain on the baby's spine. Should you decide to carry your baby facing outwards, limit it to 15 to 20 minutes each time. The International Hip Dysplasia Institute does not advocate any particular carrier. http://hipdysplasia.org/developmental-dysplasia-of-the-hip/prevention/baby-carriers-seats-and-other-equipment/