"Hip dysplasia is a general term for hip instability, dislocation, or shallowness of
the hip socket. Hip instability and dislocation are more likely to occur during
infancy, while a shallow stable socket is more often discovered in adolescence
or adulthood".
"Approximately one in ten newborn infants has mild hip instability, and one in 100 may require treatment." Hip dysplasia has many causes like heredity and breech delivery. When a proper hip position is maintained while using a carrier with babies under six months, there may be a substantial benefit for natural hip development. However, "there is no evidence suggesting that failure to carry in the hip-healthy position causes hip dysplasia in otherwise healthy infant hips."
A recommended healthy hip position, which is also called the M position, is when the baby's legs are flexed with the knees bent at the level or higher than the buttocks. Carrying the baby with the legs spread around the adult's body is beneficial not only for a healthy hip position. It contributes to better weight distribution as well.
The Cococho baby carrier is acknowledged by the International Hip Dysplasia Institute (IHDI) as a healthy hip carrier. Read more about babywearing and hip dysplasia at the IHDI website.