My DD 11 months was a decent sleeper until about 6 months. The night wakings appeared to increase on weaning. Things got really bad when she was about 6.5 months and she remained a pretty poor sleeper until 9.5 months when like magic things just got better. No intervention needs. Just before it picked up, she had the odd night here and there of sleeping through which gave me hope that things were improving and indeed they were. The odd night of sleeping through has now turned into most nights. Hopefully thats what is going on with your DC.