I returned to work 4 days a week when DD1 was 12 months and dropped back to 3 days when she was 15 months. With DD2 I returned to work when she was 12 months 3 days a week. It was hard but both girls have adjusted really well and they both love it. My mum has them 1 day a week and the other 2 they are in CC. They love it when they see me after a long day but they also love going to see their friends.

Personally I found 4 days to be too hard but 3 days was a good balance.