These are some of the many benefits of wearing your baby regularly:

• Babies cry less. Research has shown that
  babies who are carried cry (on average) 43% less overall and 54% less
  during the evening hours. In cultures where babies are carried almost
  continuously, babies cry much less than those in non-carrying culture.
• Good for baby’s intellectual development.
  Babies spend more time in a “quiet, alert state” when carried -
  the ideal state for learning. Their senses are stimulated while being
  carried. When carried, your baby sees the world from where you do, instead
  of seeing people’s knees from a pram. And the extra stimulation benefits
  brain development.
• Good for baby’s emotional development. Babies
  are quickly able to develop a sense of security and trust when they are
  carried. They are more likely to be securely attached to their care-giver/s
  and often become independent at an earlier age.
• Good for baby’s physical development. By
  being so close to your body’s rhythms, your newborn “gets in
  rhythm” much more quickly. Your heartbeat, breathing, voice and
  warmth are all familiar. Research has shown how this helps newborns
  (especially premature babies) to adapt to life outside the womb.
• Good for babies whose mums are depressed. Babies who are not held need more verbal
  interaction and eye contact, just to be reassured that you’re there.
  Carrying your baby is a great way to connect with her (and provide
  stimulation too) when you are struggling to just get through the day.
• It’s great for other people who look after your baby: Partners who work away from home, relatives
  and babysitters all have a ready way of connecting with and soothing your
  baby when they wear him too, making it easier to take advantage of
  offered help.