Beginning around the 10th month, most babies demonstrate a strong attachment to Mom and Dad.

Your little charmer, the one who used to cuddle happily in anyone's arms, will become wary of strangers and unfamiliar situations. If she fusses or cries when you leave the room, take comfort in knowing she has reached an important cognitive and emotional milestone.

Your baby's understanding of "object permanence" means she remembers you and wonders when you're coming back. This new stage is sometimes called separation anxiety, but you may prefer to think of it as missing mom.