Newborns seems more or less happy with anyone who looks after them in a caring way. After 6 months, this changes.

Your baby begins to show signs of attachment to you. 'Attachment' is what psychologists call the special bonding between mother and baby.

When he's with his mother, a baby feels secure. He loves to be with her, frets when she goes away and settles quickly when she comes back. This is also the period when the baby begins to be nervous around unfamiliar people.

From attachment to independence
Attachment grows from about 6-7 mths and peaks at about 12-18 mths. Once this stage passes, a period of increasing independence and self-assertion begins. Unfortunately, many mothers return to work just at the time when a baby's attachment is becoming intense and he's uneasy around strangers.

All babies are individuals
Some babies are very sensitive to changes in their routine and react particularly badly if their mother is away for long stretches of time. It's nothing to worry about, although it can be upsetting. If your baby has this temperament, it's particularly important to minimize change.

After some time, if he doesn't settle, you may have to rethink your arrangements for a while until he's more mature and independent. It doesn't mean you're doing anything wrong, it's just your baby's personality.

• Development 10-12 Mths: First Words
• Your Baby & Your Childminder
• Discussion: Dealing With Day Nurseries