By now, your baby's physical developments are coming fast and furious. When you pull your baby up from a lying-down position, your little one may lift his or her head and shoulders. When your baby is having tummy time, you may see him or her move into a Superman position with extended arms and legs and an arched back. This is good exercise for strengthening the neck muscles and gaining the head control necessary for sitting up.

Your baby's spine is straightening – another prerequisite for sitting unsupported. When your baby does sit solo, it will free his or her hands for exploring and allow for pivoting to reach a desired object. And once your baby's sitting, it's just a matter of time until he or she moves on to crawling, standing, and walking.

Babbling baby

Your baby is adding new sounds to his or her language repertoire, and may sound like a broken record. Babies this age often become so enthralled by a newfound ability that they get stuck on it for a while. So don't be concerned if you're hearing the same sound over and over again.

Your baby may also watch your mouth intently when you speak and try to imitate inflections and utter consonant sounds such as m and b.

Related Items Developmental milestones: Sitting Developmental milestone: Talking