Think GF suggests it. Dd2 was nearly sleeping through the night, dream feed and then waking between 5 and 6, but since I've started weaning her age 6 months is now waking every 3-4 hours again. Am doing BLW so haven't cut out any daytime milk feeds. She settles fine at 6.30-7, well I feed her to sleep, but then wakes at 9.30-10, again at 1.30- 2 and again at 5ish. We give her a bottle at the 10 feed, but the middle of the night one she just feeds for about 5 mins so I don't think she is really hungry.
Remember reading something about the core night and settling with water. Or any other suggestions? It's been going on for a couple of weeks so don't think it can be a growth spurt.